Camper's fastener (4,3)
I believe the answer is:
tent peg
'camper's fastener' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for tent peg that I've seen before include "will hold a guy down" , "Camping equipment" , "A guy could get attached to that" , "Securer for marquee" , "one often found pinning a guy down" .)