Paint bird and wild lions (8)
I believe the answer is:
emulsion
'paint' is the definition.
(I've seen this before)
'bird and wild lions' is the wordplay.
'bird' becomes 'emu' (emu is a type of bird).
'and' is a charade indicator (letters next to each other).
'wild' is an anagram indicator.
'lions' with letters rearranged gives 'lsion'.
'emu'+'lsion'='EMULSION'
(Other definitions for emulsion that I've seen before include "Mixture of insoluble liquids" , "Mixture involving two liquids which do not readily combine" , "Type of paint" , "Wall paint" .)