Animal intended to be without a colour (7)
I believe the answer is:
pigment
'colour' is the definition.
(I know that pigment is a type of colour)
'animal intended to be without a' is the wordplay.
'animal' becomes 'pig' (pigs are animals).
'intended' becomes 'meant' (to mean something is to intend it).
'to be without' suggests deleting specific letters.
'meant' with 'a' taken out is 'ment'.
'pig'+'ment'='PIGMENT'
(Other definitions for pigment that I've seen before include "Colouring substance" , "Substance giving colour" , "Colourful substance" , "Colouring matter" , "become imbued" .)