Friend in European city follows daughter, mum or dad? (10)
I believe the answer is:
palindrome
'mum or dad?' is the definition.
('mum' and 'dad' are palindromes)
'friend in european city follows daughter' is the wordplay.
'friend' becomes 'pal' (pal is a kind of friend).
'european city' becomes 'rome' (capital of Italy).
'follows' says to put letters next to each other.
'daughter' becomes 'd' (genealogical abbreviation).
'rome' after 'd' is 'drome'.
'pal'+'in'+'drome'='PALINDROME'
(Other definitions for palindrome that I've seen before include "E.g. mum, dad" , "Mum, Dad or Sis" , "madam, perhaps" , "Mum, say" , "Word(s) reading the same forward and back" .)