Chap developed hate below (7)
I believe the answer is:
beneath
'below' is the definition.
('beneath' can be a synonym of 'below')
'chap developed hate' is the wordplay.
'chap' becomes 'ben' (**).
'developed' indicates anagramming the letters.
'hate' is an anagram of 'eath'.
'ben'+'eath'='BENEATH'
(Other definitions for beneath that I've seen before include "Unbefitting" , "Inferior to" , "At a lower level (than)" , "At a lower place" , "in a lower position" .)