Copies sent up include one in colour (5)
I believe the answer is:
sepia
'colour' is the definition.
(I know that sepia is a type of pigment)
'copies sent up include one' is the wordplay.
'copies' becomes 'apes' ('ape' can be a synonym of 'copy').
'sent up' shows that the letters should be reversed in order.
'include' means one lot of letters goes inside another.
'one' becomes 'i' (Roman numeral).
'apes' backwards is 'sepa'.
'sepa' placed around 'i' is 'SEPIA'.
'in' acts as a link.
(Other definitions for sepia that I've seen before include "Pigment got from cuttlefish ink" , "Rich reddish-brown colour" , "Dark reddish-brown pigment" , "cuttle" , "source of ink" .)