I Hear That! solution
by Kegler

Nine entries have replaced animals with the sounds they make.

I Hear That! solution grid

Across
1MILLIONAIRE (MINERAL OIL I anag) {ROAR}
9A + L(C)OVES
11CIA + O
12S + LOT
15DUBAI ("DO BUY" hom)
16UNAIDED (DUDE IN A anag)
17GRO(U)PER
19ME + R + CK
20MA(TEd)Y
21MAY + O (rev)
22OD(D)'S
24CO(W + R)Y {MOO}
26eQUIPS
27CR + OWNERS {CAW}
29JAy + DOUBlE
32A + S + PEN
34O + GRE
35CUES ("Q's" hom)
36S(K)INNED
37ARCHENEMY (rev. hidden) {CLUCK}
Down
1M + ASK
2dILLER
3R(OTG)UTS (GOT anag)
4A(lEO)N
5AB(DICA + T)ED (ACID rev) {MEOW}
6ICU ("I SEE YOU" hom)
7RIBERA (A BRIER anag)
8SP(IG)OTS (GI rev) {OINK}
10CO(CO)At
13SUPERSONIC (PERCUSSION anag)
14DO + G + MA {BARK}
17GEODUCK (DUG COKE anag) {QUACK}
18tEY + ECUP (rev)
21MO(N + GO)OSE {HONK}
23DIAPER (rev)
25REIGN ("RAIN" hom)
28RO(R)EM (MORE anag)
30BAKU (1st letters)
31HE'D + Y
33ESC (hidden)