Nominal hairstyle for the male (5)
I believe the answer is:
hiram
'nominal hairstyle' is the definition.
The definition suggests a singular noun which matches the answer.
'for the male' is the wordplay.
'for' becomes 'hi' (I can't justify this - if you can you should give a lot more credence to this answer).
'the male' becomes 'ram' (male sheep).
'hi'+'ram'='HIRAM'
Can you help me to learn more?
(Other definitions for hiram that I've seen before include "He supplied temple builders" , "I gave Solomon materials for Temple" .)