Take back worker to sports ground (6)
I believe the answer is:
recant
'take back' is the definition.
(thesaurus)
'worker to sports ground' is the wordplay.
'worker' becomes 'ant' (worker is a type of ant).
'to' means one lot of letters go next to another (I've seen this in other clues).
'sports ground' becomes 'rec' (I've seen this in other clues).
'ant' after 'rec' is 'RECANT'.
(Other definitions for recant that I've seen before include "Renounce a former opinion or belief" , "Revoke a former declaration" , "Disown" , "Disavow" , "Take back something said" .)