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All answers having "Biting" as clue:

3 Character Answers:

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HOT

RHO



4 Character Answers:

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ACID

KEEN

TART



5 Character Answers:

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ACERB

ACRID

BRISK

NIPPY

SHARP

SNIDE



6 Character Answers:

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ACIDIC



7 Character Answers:

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ACERBIC

CAUSTIC

MORDANT

NIPPING

PUNGENT

SATIRIC



8 Character Answers:

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SARDONIC



9 Character Answers:

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TRENCHANT



14 Character Answers:

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GORILLATACTICS