A Chessword Puzzle by Radix - Solution & Notes

QUEENS
5 ERE: first letters
8 SNY: S(A)N(D)Y
12 AET: AE-T
17 MAG: two meanings
25 SAD: SA-D
28 ASP: AS-P
32 GUN: G-UN
37 AKA: (J)A(C)K(T)A(R)

AMAZONS
3 BAR-IRON: BARI-NOR
7 DESERT PEA: DESPERATE*
15 TRENAIL: RELIANT*
19 LEAPER: LEA-PER
23 EROTEME: E-ROTE-ME
27 UNENVIOUS: VINE* in U-NOUS
35 STREAMS: S-MASTER*
39 ECHOER: E-CHORE*

CRUSADERS
1 SLACKEN: LAC-K in SEN
10 SAGAMORE: SAGA-MORE
13 EUGENIST: ENGSUITE*
20 ENTHRALLS: ALL in TEN*-HRS
21 ANATASE: SATAN in EA reversed
30 TENEBRAE: TENE-BR-A-E
33 LINGERER: LINGER(IE)-ER
40 SLIDE REST: SL(END®ID)EREST

EMPERORS
4 LEGLET: LEG-LET
6 ESPRIT: PRIEST*
11 RANGE: N in RAGE
16 ENEMIES: (V)IE(T)N(A)MESE*
24 REUSES: R(O®E)USES
26 STYLUS: STY-L-US
31 REVEL: LEVER
36 STIBINE: INIBEST*

PONTIFFS
2 ACINUS: AC-IN(vb)-US, ref Great Expectations
9 DEBASERS: AS-ER in DEBS
14 SERIEMAS: RIEM in SEAS(ON), NIX(vb)
18 AGENT: GEN in AT
22 SECEDE: C(H)EESED*
29 ERASABLE: ERAS-ABLE
34 LOVE GAME: VOLE*-GAME
38 MESSY: ESS(AY) in MY