Composer seen in very small supermarket after six (7)
I believe the answer is:
vivaldi
'composer' is the definition.
(composer Antonio Vivaldi)
'very small supermarket after six' is the wordplay.
'very small' becomes 'v' (abbreviated or small form of 'very').
'supermarket' becomes 'aldi' (German supermarket also operating in the UK).
'after' is a charade indicator (letters next to each other).
'six' becomes 'VI' (Roman numerals).
'v'+'aldi'='valdi'
'valdi' after 'vi' is 'VIVALDI'.
'seen in' is the link.
(Other definitions for vivaldi that I've seen before include "Italian composer known as "the red priest"" , "Italian composer of 'The Four Seasons'" , "Venetian composer ("The Red Priest"), d. 1741" , "Baroque Venetian composer, d.1741" , "Italian composer, Antonio (d. 1741)" .)