Queen Victoria's husband (6)
I believe the answer is:
albert
'queen victoria's husband' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for albert that I've seen before include "Prince with 24" , "M [MUSEUM] with 18 [VICTORIA]" , "chap" , "- Square, Walford (EastEnders)" , "Keep watch" .)