Shield or belt attachment? Right! (7)
I believe the answer is:
buckler
'shield' is the definition.
(I know that shield can be written as buckler)
'belt attachment? right' is the wordplay.
I cannot really see how this works, but
'right' could be 'r' (common abbreviation) and 'r' is found in the answer.
The remaining letters 'buckle' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...
'or' acts as a link.
Can you help me to learn more?
(Other definitions for buckler that I've seen before include "Small round shield" , "likely to give way under pressure?" , "Small shield for the forearm" , "gives way under pressure?" .)