Head of Parlophone loves scat (3)
I believe the answer is:
poo
'scat' is the definition.
(both can informally mean excrement)
'head of parlophone loves' is the wordplay.
'head of' suggests taking the first letters.
'loves' becomes 'oo' (love means 0 in tennis).
The initial letter of 'parlophone' is 'p'.
'p'+'oo'='POO'
(Other definitions for poo that I've seen before include "Expression of disgust; sounds like bear" , "Expression of disgust (at, eg, bad smell)" , "number two?" .)