One giving partial cover to member in strike (4)
I believe the answer is:
sock
I believe this clue is a double definition.
'one giving partial cover to member' is the first definition.
'strike' is the second definition.
(I've seen this before)
'in' acts as a link.
(Other definitions for sock that I've seen before include "Woollen footwear" , "Very short stocking?" , "bash" , "Hit with a powerful blow" , "Hit; horse's leg marking" .)