English in agreement: blades do some retracting (3,4,5)
I believe the answer is:
eat ones words
'do some retracting' is the definition.
(to eat one's words is to retract a statement)
'english in agreement blades' is the wordplay.
'english' becomes 'e' (abbreviation).
'in agreement' becomes 'atone' (at one can mean in agreement).
'blades' becomes 'swords' ('sword' can be a synonym of 'blade').
'e'+'atone'+'swords'='EAT ONES WORDS'
(Other definitions for eat ones words that I've seen before include "Recant - retract" , "Take back earlier pronouncement" , "Humbly take back something said" , "Retract what one has said" , "Retract a statement" .)