Livid initially after fling (4)
I believe the answer is:
ashy
'livid' is the definition.
(I've seen this in another clue)
'initially after fling' is the wordplay.
'initially' indicates taking the first letters.
'fling' becomes 'shy' (I've seen this before).
The initial letter of 'after' is 'a'.
'a'+'shy'='ASHY'
(Other definitions for ashy that I've seen before include "Light grey" , "Grey-coloured" , "Like fireplace residue" , "like a cinder track?" , "Wan" .)