Team golfer wearing short fleece (7)
I believe the answer is:
chelsea
'team' is the definition.
(Chelsea football club)
'golfer wearing short fleece' is the wordplay.
'golfer' becomes 'els' (Ernie Els - former number one professional golfer).
'wearing' means one lot of letters goes inside another.
'short' means to remove the last letter.
'fleece' becomes 'cheat' (fleece can mean to cheat someone).
'cheat' with its final letter removed is 'chea'.
'els' inserted into 'chea' is 'CHELSEA'.
(Other definitions for chelsea that I've seen before include "upmarket part of London" , "Sort of bun" , "Part of Manhattan" , "Hillary Clinton's daughter" , "Stamford Bridge team" .)