Female diner excited partner (6)
I believe the answer is:
friend
'partner' is the definition.
(thesaurus)
'female diner excited' is the wordplay.
'female' becomes 'f' (abbreviation**).
'excited' is an anagram indicator.
'diner' with letters rearranged gives 'riend'.
'f'+'riend'='FRIEND'
(Other definitions for friend that I've seen before include "Associate, supporter" , "Organisation's supporter" , "Pal, amigo" , "Buddy, chum" , "Comrade for finder" .)