Fit with sails and tackling (3)
I believe the answer is:
rig
'fit with sails and tackling' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for rig that I've seen before include "Outfit of clothes or oil-drilling platform" , "Oil derrick" , "Oil-drilling device" , "Outfit; fix" , "Put sails on" .)