Social worker in quarantine (3)

I believe the answer is:

ant

'social worker' is the definition.
(ants are social insects)

'in quarantine' is the wordplay.
'in' indicates the answer is hidden within the clue.
'ANT' is hidden within 'quarantine'.

(Other definitions for ant that I've seen before include "One more provident than Grasshopper" , "Little boy" , "Colonial insect?" , "The insect lives in a social colony" , "maybe in hill" .)

I've seen this clue in the Evening Standard.

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