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All answers having "Representative" as clue:

3 Character Answers:

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AGT

POL



4 Character Answers:

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PAIN



5 Character Answers:

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AGENT

ASSAM

BATON

ENVOY

LASSO

PROXY

TALLY

TOKEN

TYPAL



6 Character Answers:

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ICONIC

LEGATE



7 Character Answers:

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EASTERN

ENTHRAL

NETBALL

TYPICAL



8 Character Answers:

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DELEGATE

EMISSARY

SYMBOLIC



9 Character Answers:

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PTARMIGAN



10 Character Answers:

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AMBASSADOR

EMBLEMATIC



13 Character Answers:

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RUBBERSTAMPED