Crossword Genius

A social worker (3)

Ross

I believe the answer is:

ant

I'm a little stuck... Click here to teach me more about this clue!

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

'a social' is the wordplay.
I cannot quite understand how this works, but
'a' could be 'an' and 'an' is found in the answer.
A single letter 't' remains which might be clued in a way I don't understand.
This explanation may well be incorrect...

Can you help me to learn more?

(Other definitions for ant that I've seen before include "` `Go to the ... thou sluggard' '" , "Member of colony" , "Dec's long-time partner" , "The insect lives in a social colony" , "one living in colonies" .)

I've seen this clue in the Evening Standard.
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