Spray a cat - skinflint misses head (8)
I believe the answer is:
atomiser
'spray' is the definition.
(I know that spray can be written as atomiser)
'a cat skinflint misses head' is the wordplay.
'a cat' becomes 'atom' (I am not sure about this - if you are sure you should believe this answer much more).
'skinflint' becomes 'miser' (synonyms).
'misses head' means to remove the first letter (I've seen 'missing head' mean this).
'miser' with its initial letter removed is 'iser'.
'atom'+'iser'='ATOMISER'
Can you help me to learn more?
(Other definitions for atomiser that I've seen before include "Device for making liquid into a fine spray" , "Spraying device - same riot (anag)" , "Perfume spray" , "Amortise for spray-creating device" , "Fine spray producer" .)