Spray from a cat is here inside (8)
I believe the answer is:
atomiser
'spray' is the definition.
('atomiser' can be a synonym of 'spray')
'a cat is here inside' is the wordplay.
'cat' becomes 'tom' (a tom is a male cat).
'inside' indicates the central letters.
The middle letters of 'here' are 'er'.
'a'+'tom'+'is'+'er'='ATOMISER'
'from' is the link.
(Other definitions for atomiser that I've seen before include "Container that releases liquid in a fine spray" , "Mister" , "Amortise for spray-creating device" , "Fine spray producer" , "Perfume spray" .)