Back objective to replace leader in Hackney? (7)
I believe the answer is:
endorse
'back' is the definition.
(synonyms)
'objective to replace leader in hackney?' is the wordplay.
I cannot quite see how this works, but
'objective' could be 'end' (I've seen this before) and 'end' is found in the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for endorse that I've seen before include "Uphold" , "Add one's authority to" , "Say you approve" , "Support; sanction" , "Put one's name to, approve" .)