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All answers having "Tons" as clue:

3 Character Answers:

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RHO



4 Character Answers:

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ALOT

GOBS

LOTS

MANY

SLEW



5 Character Answers:

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AHEAP

AHOST

ALOAD

ASLEW

HEAPS

LOADS

PILES

REAMS

SCADS

SLEWS



6 Character Answers:

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OCEANS

OODLES



8 Character Answers:

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ALLSORTS

CARLOADS