A clerk’s odd half-cut hairstyle (10)
I believe the answer is:
dreadlocks
'hairstyle' is the definition.
(I have seen 'Rastafarian hairstyle' mean 'dreadlocks' so perhaps 'hairstyle' could also mean 'dreadlocks')
'a clerk's odd half-cut' is the wordplay.
'half-cut' is an anagram indicator (half-cut can mean drunk).
'a'+'clerks'+'odd'='aclerksodd'
'aclerksodd' anagrammed gives 'DREADLOCKS'.
(Other definitions for dreadlocks that I've seen before include "Long, tight hair braids" , "great shock" , "Rastafarian hairstyle" , "They're pretty hairy!" , "Barnet" .)