Darts, beer, excited Robin? (9)
I believe the answer is:
redbreast
'robin?' is the definition.
('redbreast' can be a synonym of 'robin')
'darts beer excited' is the wordplay.
'excited' indicates an anagram.
'darts'+'beer'='dartsbeer'
'dartsbeer' anagrammed gives 'REDBREAST'.
(Other definitions for redbreast that I've seen before include "Flapper" , "One tweets" , "Type of robin" , "Bird" .)