Across
2 Across Tiny fragments left when hermits seen wandering after a blast (11) → SMITHEREENS Anagram
Anagram of “hermits seen”.
8 Across Bear's young with tiny circuit is cube-shaped (5) → CUBIC Charade
CUB + IC.
9 Across Wild rave with pal causes a fuss (7) → PALAVER Anagram
Anagram of “rave pal”.
10 Across Devoted fans arise when acid, sofa and ion are wildly mixed (11) → AFICIONADOS Anagram
Anagram of “acid sofa ion”.
12 Across Flat fruit biscuit is also a bright orange reef fish (9) → GARIBALDI Double definition
Two separate definitions of the same word.
17 Across Popular starter dish made when arcade salsa is mixed up (6,5) → CAESAR SALAD Anagram
Anagram of “arcade salsa”.
19 Across Villa redesigned with gold produces river deposits (7) → ALLUVIA Anagram
Anagram of “villa au”.
21 Across Very keen once agree is rearranged (5) → EAGER Anagram
Anagram of “agree”.
22 Across Outright rejection when flare faults are rearranged (4,7) → FLAT REFUSAL Anagram
Anagram of “flare faults”.
Down
1 Down Curved structure with artificial intelligence and a hundred seems old-fashioned (7) → ARCHAIC Charade
ARCH + AI + C.
2 Down Big snob rearranged, weeping (7) → SOBBING Anagram
Anagram of “BIG SNOB”.
3 Down Rich tie, jumbled, leaves one prone to scratching (7) → ITCHIER Anagram
Anagram of “RICH TIE”.
4 Down Fashionable, having ideas prepared, at first (3) → HIP Initialism
First letters of: Having, Ideas, Prepared.
5 Down Forty-nine set inside flushed, provoked (5) → RILED Container
IL inside RED.
6 Down Forest folk hidden in shovel vests (5) → ELVES Hidden word
Hidden inside “shovel vests”.
7 Down Call for silence atop a floor covering, a shoulder gesture (5) → SHRUG Charade
SH + RUG.
11 Down Greek letter with a couple then one, ancient African region (5) → NUBIA Charade
NU + BI + A.
13 Down Camera part holding the letter ess, diminishes (7) → LESSENS Container
ESS inside LENS.
14 Down Gale making one ill, jumbled, against the law (7) → ILLEGAL Anagram
Anagram of “GALE ILL”.
15 Down Wild animal containing an editor, of central government (7) → FEDERAL Container
ED inside FERAL.
16 Down Tea, very loud, will tease (5) → CHAFF Charade
CHA + FF.
17 Down Spy agency embracing fifty-one produces microscopic hairs (5) → CILIA Container
LI inside CIA.
18 Down Young eel hides in gospel verse (5) → ELVER Hidden word
Hidden inside “gospel verse”.
20 Down Angry red fox, at first, gives a bark (3) → ARF Initialism
First letters of: Angry, Red, Fox.