Workers for some person at the ministry (6)
I believe the answer is:
miners
'workers' is the definition.
(miner is a kind of worker)
'some person at the ministry' is the wordplay.
'some' indicates the central letters.
'at' means one lot of letters go next to another (I've seen this in other clues).
'the ministry' becomes 'mine' (I can't explain this - if you can you should give a lot more credence to this answer).
The middle letters of 'person' are 'rs'.
'rs' after 'mine' is 'MINERS'.
'for' is the link.
Can you help me to learn more?
(Other definitions for miners that I've seen before include "They excavate the earth" , "Pit workers" , "out in 1972?" , "Labourers below ground" , "Extractors" .)