Rebound causing defender to shoot (8)
I believe the answer is:
backfire
'rebound' is the definition.
(thesaurus)
'defender to shoot' is the wordplay.
'defender' becomes 'back' (I've seen this in other clues).
'to shoot' becomes 'fire' (firing is a kind of shooting**).
'back'+'fire'='BACKFIRE'
'causing' is the link.
(Other definitions for backfire that I've seen before include "Rebound adversely (on the originator)" , "Boomerang" , "report" , "Have an unintended negative consequence" , "Rebound on oneself" .)