Make use of English politician and – behold – recovery at last (6)
I believe the answer is:
'make use of' is the definition.
('employ' can be a synonym of 'make use of')
'english politician and behold recovery at last' is the wordplay.
'english' becomes 'e' (abbreviation).
'politician' becomes 'mp'.
'and' says to put letters next to each other.
'behold' becomes 'lo'.
'at last' indicates one should take the final letters.
The last letter of 'recovery' is 'y'.
(Other definitions for employ that I've seen before include "Utilize" , "Draw on" , "Give work to (someone)" , "Occupy" , "Use or give job to" .)