Check clasher (5)
I believe the answer is:
plaid
'check clasher' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for plaid that I've seen before include "Tartan-pattern cloth" , "Check fabric" , "Part of Scots dress or Welsh party" , "party in Wales" , "Tartan twill cloth" .)