Non-striker switched bats after changing ends in cricket (4)
I believe the answer is:
scab
'non-striker' is the definition.
(I've seen this before)
I don't understand the rest of the clue.
Can you help me to learn more?
(Other definitions for scab that I've seen before include "Crust of congealed blood" , "work when others are out" , "Derogatory term for a strike-breaker" , "Crust that forms on a healing skin wound" , "Dried surface of wound" .)