Scrap of pink paper that's a case for scrap collectors (8)
I believe the answer is:
fragment
'scrap' is the definition.
(I've seen this in another clue)
'pink paper that's a case for scrap collectors' is the wordplay.
'pink paper' becomes 'FT' (the Financial Times is printed on pink paper).
'that's a case for' is an insertion indicator.
'scrap collectors' becomes 'ragmen' (I've seen this in another clue).
'ft' placed around 'ragmen' is 'FRAGMENT'.
'of' acts as a link.
(Other definitions for fragment that I've seen before include "Piece broken off something else" , "Incomplete part" , "Shard" , "Small portion" , "Broken-off piece" .)