Levy, we hear, for fasteners (5)
I believe the answer is:
tacks
'fasteners' is the definition.
(tack is a kind of fastener)
'levy we hear' is the wordplay.
'levy' becomes 'tax' (taxing is a kind of levying).
'we hear' indicates a 'sounds like' (homophone) clue.
'tax' sounds like 'TACKS'.
'for' acts as a link.
(Other definitions for tacks that I've seen before include "They secure" , "Short nails" , "a few points" , "Small broad-headed nails" , "Shorts nails with big heads" .)