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All answers having "A great deal" as clue:

3 Character Answers:

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LOT



4 Character Answers:

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ALOT

GOBS

LOTS

MINT

MUCH

SCAD

TONS



5 Character Answers:

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HEAPS

NOEND

OFTEN

RAFTS

SCADS

SLEWS



6 Character Answers:

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OODLES



8 Character Answers:

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VERYMUCH