Farmer that may be used to steer? (6)
I believe the answer is:
tiller
I believe this clue is a double definition.
'farmer' is the first definition.
(I know that tiller is a type of farmer)
'used to steer?' is the second definition.
(I've seen this before)
'that may be' is the link.
(Other definitions for tiller that I've seen before include "Boat's steering bar" , "Rudder's steering handle" , "dancing girl?" , "Bar that turns rudder in small boat" , "steering contraption" .)