Central bureau fairly likely to reciprocate (7)
I believe the answer is:
requite
'to reciprocate' is the definition.
(I've seen this in another clue)
'central bureau fairly' is the wordplay.
'central' means to look at the middle letters.
'fairly' becomes 'quite' (I've seen this before).
The middle letters of 'bureau' are 're'.
're'+'quite'='REQUITE'
'likely' acts as a link.
I am not very happy about this link. It may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for requite that I've seen before include "Make return" , "Appropriately, give back" , "Quieter (anag.)" .)