... did sport with next to nothing on (4)
I believe the answer is:
wore
'did sport' is the definition.
(ie sported - sport can mean to wear)
'with next to nothing on' is the wordplay.
'with' becomes 'w' (abbreviation).
'next to' is a charade indicator (letters next to each other).
'nothing' becomes 'o' (O resembles 0).
'on' becomes 're' ('on' can be mean 'with reference to').
'w'+'o'+'re'='WORE'
(Other definitions for wore that I've seen before include "Sported, put on" , "Was clad in" , "Wear's past" , "Was clothed in" , "Was dressed in" .)