Bat defensively, a single wicket in stand (9)
I believe the answer is:
stonewall
'bat defensively' is the definition.
(cricket term)
'a single wicket in stand' is the wordplay.
'a single' becomes 'one' (a single thing - only one).
'wicket' becomes 'w'.
'in' means one lot of letters goes inside another.
'stand' becomes 'stall' (synonyms).
'one'+'w'='onew'
'onew' put into 'stall' is 'STONEWALL'.
(Other definitions for stonewall that I've seen before include "Use delaying tactics as in cricket" , "Obstruct or hinder any discussion" , "Delay or block (a proposal's) progress" , "Hold up progress" , "Stand firm" .)