Kit I would find unyielding (5)
I believe the answer is:
rigid
'unyielding' is the definition.
(I've seen this before)
'kit i would' is the wordplay.
'kit' becomes 'rig' (I've seen this in other clues).
'i would' becomes 'I'd'.
'rig'+'id'='RIGID'
'find' is the link.
(Other definitions for rigid that I've seen before include "Unable to bend" , "Frozen" , "not relaxing" , "unwilling to move" , "strict" .)