Girl in pub twice heading for another (7)
I believe the answer is:
barbara
'girl' is the definition.
'pub twice heading for another' is the wordplay.
'pub' becomes 'bar' (both are drinking establishments).
'twice' shows that letters should be duplicated.
'heading for' says to take the initial letters.
The first letter of 'another' is 'a'.
'bar' duplicated is 'barbar'.
'barbar'+'a'='BARBARA'
'in' acts as a link.
(Other definitions for barbara that I've seen before include "girl" , "Major -, (G. B. Shaw)" , "Dame - Cartland, English author" , "Major -, (G.B. Shaw)" , "- Hepworth, twentieth century English sculptress" .)