Team hiding under mother's skirt (4)
I believe the answer is:
maxi
'skirt' is the definition.
(I have seen 'Long skirt' mean 'maxi' so perhaps 'skirt' could also mean 'maxi')
'team hiding under mother's' is the wordplay.
'team' becomes 'xi' (eleven, a football team).
'hiding under' is a charade indicator (letters next to each other).
'mother' becomes 'ma' (ma is a kind of mother).
'xi' put after 'ma' is 'MAXI'.
(Other definitions for maxi that I've seen before include "Full-length skirt" , "Long skirt of coat" , "Long dress" , "Ankle-length skirt" , "Long length skirt" .)