Employee in post about to be recalled (7)
I believe the answer is:
staffer
'employee' is the definition.
(staffer is a kind of employee)
'post about to be recalled' is the wordplay.
'post' becomes 'staff' (I've seen this before).
'about to' becomes 're' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'be recalled' says the letters should be written in reverse (to recall can mean to bring something back).
're' backwards is 'er'.
'staff'+'er'='STAFFER'
'in' is the link.
Can you help me to learn more?
(Other definitions for staffer that I've seen before include "Permanent employee" , "someone at work" , "newspaper employee?" .)