Clerical assistant gets right up to the margin (6)
I believe the answer is:
verger
'clerical assistant' is the definition.
The answer and definition can be both people as well as being singular nouns.
Maybe they are linked in a way I don't understand?
'right up to the margin' is the wordplay.
'right up' becomes 'r' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'to' is a charade indicator (letters next to each other) (I've seen this in other clues).
'the margin' becomes 'verge' (verge is a kind of margin).
'r' after 'verge' is 'VERGER'.
'gets' acts as a link.
Can you help me to learn more?
(Other definitions for verger that I've seen before include "Church officer" , "Church caretaker and attendant" , "Church official" .)