Some fleecy animals in the shade (4)
I believe the answer is:
cyan
'the shade' is the definition.
(I have seen 'Shade of green ' mean 'cyan' so perhaps 'shade' could also mean 'cyan')
'some fleecy animals in' is the wordplay.
'some' indicates a hidden word (some parts of the word are used).
'CYAN' is hidden in the letters of 'fleecy animals in'.
(Other definitions for cyan that I've seen before include "Blue hue" , "Greenish-blue colour complementary to red" , "Blue printing ink" , "Blue-green colour" , "Primary blue colour in printing" .)