Time at the crease (7)
I believe the answer is:
innings
'time at the crease' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for innings that I've seen before include "Batting stint" , "Time at the wicket" , "Batsman's spell at wicket" , "Time at the crease for one batsman (or eleven)" , "Period of batting in cricket" .)