Little girl's left to play (7)
I believe the answer is:
disport
'play' is the definition.
(disporting is a kind of playing)
'little girl's left' is the wordplay.
'little girl's' becomes 'dis' (short for Diane, Diana etc).
'left' becomes 'port' (left side of a ship - opposite of starboard).
'dis'+'port'='DISPORT'
'to' is the link.
(Other definitions for disport that I've seen before include "Cavort, lark about" , "Play about" , "Amuse" , "to have a good time" .)