Plant used to make tequila (5)
I believe the answer is:
agave
'plant used to make tequila' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for agave that I've seen before include "source of tequila" , "Succulent plant" , "native growing up in tropical America" , "Plant, source of sisal" , "plant in Mexico" .)