Shaving head for Victoria, for one (5)
I believe the answer is:
flake
'shaving' is the definition.
(thesaurus)
'head for victoria for one' is the wordplay.
'head' indicates taking the first letters.
'victoria for one' becomes 'lake' (I can't justify this - if you can you should give a lot more credence to this answer).
The first letter of 'for' is 'f'.
'f'+'lake'='FLAKE'
Can you help me to learn more?
(Other definitions for flake that I've seen before include "Snow crystal" , "Flat thin fragment" , "Chipped piece of stone" , "bit of snow" , "Small flat scale" .)