Country lover Penny attending great show (7)
I believe the answer is:
patriot
'country lover' is the definition.
(someone who loves their country)
'penny attending great show' is the wordplay.
'penny' becomes 'p' (short for pence).
'attending' becomes 'at' (e.g. at school means attending school).
'great show' becomes 'riot' ('it was a riot').
'p'+'at'+'riot'='PATRIOT'
(Other definitions for patriot that I've seen before include "Tell perhaps" , "Devotee of their country" , "Country supporter" , "Loyal citizen" , "One with a strong love of country" .)