Lift to greet (4)
I believe the answer is:
doff
'lift to greet' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for doff that I've seen before include "Take off (clothing) - remove (hat)" , "shed" , "Remove one's cap" , "Take off hat as mark of respect" , "Lift (one's hat)" .)