Guitar used by Texan on rise (3)
I believe the answer is:
axe
'guitar' is the definition.
(I've seen this before)
'used by texan on rise' is the wordplay.
'used by' indicates the answer is hidden within the clue.
'on rise' says the letters should be written backwards (in a down clue, letters go up).
'exa' can be found hidden inside 'texan'.
'exa' reversed gives 'AXE'.
(Other definitions for axe that I've seen before include "Fraternize" , "Cut costs or staff drastically" , "Terminate - with a hatchet?" , "Sack with cleaver?" , "Make redundant" .)