Chap with whom mum goes to the Nag's Head (3)
I believe the answer is:
man
'chap with' is the definition.
'Man' can be an answer for 'chap' (chap can mean a man). I'm unsure of the 'with' bit.
'mum goes to the nag's head' is the wordplay.
'mum' becomes 'ma' (ma can mean mother).
'goes to' says to put letters next to each other.
'head' indicates taking the first letters.
The initial letter of 'nags' is 'n'.
'ma'+'n'='MAN'
'whom' acts as a link.
Can you help me to learn more?
(Other definitions for man that I've seen before include "Male person" , "Adult human male" , "race" , "Staff the island" , "Isle of ..., ... o'war" .)