Caught in street fight (6)
I believe the answer is:
struck
'caught' is the definition.
The definition and answer can be both related to change as well as being past participle verbs.
Maybe they are linked in a way I don't understand?
'street fight' is the wordplay.
'street' becomes 'st' (abbreviation).
'fight' becomes 'ruck' (I've seen this before).
'st'+'ruck'='STRUCK'
'in' is the link.
Can you help me to learn more?
(Other definitions for struck that I've seen before include "Hit; sounded (hour)" , "(Of clock) chimed" , "Collided" , "Delivered a sharp blow" , "Took industrial action" .)