Tinny performance with English figure (6)
I believe the answer is:
ninety
'figure' is the definition.
(I've seen this before)
'tinny performance with english' is the wordplay.
'performance with' is an anagram indicator.
'english' becomes 'e' (abbreviation).
'tinny' with its letters anagrammed with 'e' can make 'NINETY'.
(Other definitions for ninety that I've seen before include "old age" , "Cardinal" , "Excellent percentage score" , ""Top of the shop" in bingo" , "Joe perhaps" .)