Game girl carrying new bat (7)
I believe the answer is:
netball
'game' is the definition.
(netball is a kind of game)
'girl carrying new bat' is the wordplay.
'girl' becomes 'nell' (I've seen this before**).
'carrying' indicates putting letters inside.
'new' indicates an anagram.
'bat' anagrammed gives 'tba'.
'nell' enclosing 'tba' is 'NETBALL'.
(Other definitions for netball that I've seen before include "Sport whose players wear bibs" , "Seven-a-side team game -- all bent (anag)" , "Team game, played mainly by women" , "After this, you get to serve again" , "Women's game" .)