Conservative with shock lead (5)
I believe the answer is:
chair
'lead' is the definition.
(I know that lead can be written as chair)
'conservative with shock' is the wordplay.
'conservative' becomes 'C' (UK political abbreviation).
'with' says to put letters next to each other.
'shock' becomes 'hair' (shock can mean a mass of hair).
'c'+'hair'='CHAIR'
(Other definitions for chair that I've seen before include "Windsor, for example" , "academic office" , "A committee's most important seat" , "Seat (of learning?)" , "Preside, guide meeting" .)