A chap to tease (3)
I believe the answer is:
guy
I believe this clue is a double definition.
'a chap' is the first definition.
'tease' is the second definition.
(thesaurus)
'to' is the link.
(Other definitions for guy that I've seen before include "Make fun of - fellow" , "One burned on Nov. fifth" , "Stay < and make fun" , "Stay - ridicule - chap" , "Bloke" .)