Saw no net used (5)
I believe the answer is:
tenon
'saw' is the definition.
(I've seen this before)
'no net used' is the wordplay.
'used' indicates an anagram.
'no'+'net'='nonet'
'nonet' with letters rearranged gives 'TENON'.
(Other definitions for tenon that I've seen before include "End of a piece of wood shaped to form a mortise joint" , "joiner" , "Part of joint that fits in mortise" , "Piece of wood that fits into a mortise" , "Piece to fit into mortise" .)