One suggesting work in plain English meeting resistance (8)
I believe the answer is:
proposer
'one suggesting' is the definition.
'work in plain english meeting resistance' is the wordplay.
'work' becomes 'op' (abbreviation for opus).
'in' indicates putting letters inside.
'plain english' becomes 'prose'.
'meeting' says to put letters next to each other.
'resistance' becomes 'r' (abbreviation).
'op' put inside 'prose' is 'propose'.
'propose'+'r'='PROPOSER'
(Other definitions for proposer that I've seen before include "Advocate" , "One putting forward idea" , "One coming up with" , "I'd suggest" , "Person putting motion forward" .)