Range of colours permitted in meat paste (7)
I believe the answer is:
palette
'range of colours' is the definition.
(I've seen this before)
'permitted in meat paste' is the wordplay.
'permitted' becomes 'let' (I've seen this before).
'in' means one lot of letters goes inside another.
'meat paste' becomes 'pate' (I've seen this before).
'let' put inside 'pate' is 'PALETTE'.
(Other definitions for palette that I've seen before include "Artist's range of colour" , "Range of colours - what artist mixes them on" , "Board on which painter mixes colours" , "Board for an artist" , "Artists mix on this" .)