Looked for person, by the sound of it (6)
I believe the answer is:
sought
'looked for' is the definition.
('seek' can be a synonym of 'look for')
'person by the sound of it' is the wordplay.
'person' becomes 'sot' (sot is a kind of person).
'by the sound of it' shows a homophone (sound like).
'sot' sounds like 'SOUGHT'.
(Other definitions for sought that I've seen before include "Looked for" , "Tried to find" , "Attempted to find" , "Wanted" , "Searched for - investigated - desired" .)