Deputy's short cut (6,3)
I believe the answer is:
number two
This clue is a double definition.
'deputy's' is the first definition.
(I've seen this before)
'short cut' is the second definition.
(second shortest haircut using clippers)
(Other definitions for number two that I've seen before include "Dump" , "Second-in-command" , "Second in command" , "vice" , "deputy" .)