Injury caused by a couple of cats? (8)
I believe the answer is:
whiplash
'injury' is the definition.
(I know that whiplash is a type of injury)
'a couple of cats?' is the wordplay.
'a couple of cats?' can mean two substitutions for 'cat'.
'cat' becomes 'whip' (cat o' nine tails or cat is a type of whip).
'cat' becomes 'lash' (I've seen this in another clue).
'whip'+'lash'='WHIPLASH'
'caused by' is the link.
(Other definitions for whiplash that I've seen before include "Common neck injury in car accidents" , "Injury caused by a prang?" , "Common neck injury in a car accident" , "injury - with 12a" , "inflicted by cat" .)