It moves sluggishly (5)

I believe the answer is:

snail

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'it moves sluggishly' is the definition.
The definition suggests a singular noun which matches the answer.

This is the entire clue.

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(Other definitions for snail that I've seen before include "Mollusc with coiled shell" , "Gastropod mollusc" , "Edible gastropod" , "Slow-moving 12" , "Slow-moving creature" .)

I've seen this clue in the Evening Standard.

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