Man set to become minister (8)
I believe the answer is:
chaplain
'minister' is the definition.
(I've seen this before)
'man set to' is the wordplay.
'man' becomes 'chap' (I've seen this in other clues).
'set to' becomes 'lain' (I am not sure about this - if you are sure you should believe this answer much more).
'chap'+'lain'='CHAPLAIN'
'become' is the link.
Can you help me to learn more?
(Other definitions for chaplain that I've seen before include "Forces' clergyman" , "Clergyman attached to an institution, such as the army" , "Religious minister assigned to an organisation" , "Armed services clergyman" , "Member of clergy ministering to an organisation" .)