Curtsey for your uncle? (3)
I believe the answer is:
bob
I believe this is a double definition.
'curtsey' is the first definition.
(bob can mean to make a brief curtsey)
'your uncle?' is the second definition.
(as in the phrase 'Bob's your uncle')
'for' acts as a link.
(Other definitions for bob that I've seen before include "Bounce" , "Bow" , "Old coin for Robert" , "Brief curtsy - hairstyle" , "way locks can be arranged" .)