Polish and English blokes heading for Deal (5)
I believe the answer is:
emend
'polish' is the definition.
(I've seen this in another clue)
'english blokes heading for deal' is the wordplay.
'english' becomes 'E' (abbreviation).
'blokes' becomes 'men' (bloke can informally mean a man).
'heading for' suggests taking the first letters.
The initial letter of 'deal' is 'd'.
'e'+'men'+'d'='EMEND'
'and' acts as a link.
(Other definitions for emend that I've seen before include "Remove errors" , "Edit; make alterations to a draft" , "Remove faults from" , "Edit, improve" , "Make improvements or corrections" .)