See rent? That's opening in fabric (6)
I believe the answer is:
eyelet
'opening in fabric' is the definition.
'eyelet' can be an answer for 'opening' (hole for putting a shoelace through). I am not sure about the 'in fabric' bit.
'see rent?' is the wordplay.
'see' becomes 'eye' (I've seen this in another clue).
'rent?' becomes 'let' (I've seen this in another clue).
'eye'+'let'='EYELET'
'that's' acts as a link.
Can you help me to learn more?
(Other definitions for eyelet that I've seen before include "Small opening in shoe for lace" , "Family of pheasants" , "peephole" , "Metal ring reinforcing a small round hole in fabric" , "Small hole as in needle or shoe" .)