Saw no clear profit rise (5)
I believe the answer is:
tenon
'saw' is the definition.
(I've seen this before)
'no clear profit rise' is the wordplay.
'clear profit' becomes 'net' (I've seen this in another clue).
'rise' says the letters should be written backwards.
'no'+'net'='nonet'
'nonet' written backwards gives 'TENON'.
(Other definitions for tenon that I've seen before include "Mortise filler" , "Nonet (anag.)" , "joiner" , "It makes a wood joint with a mortise" , "Wood fitting into a mortise" .)