Say again — educated Liberal must go (7)
I believe the answer is:
iterate
'say again' is the definition.
(I've seen this before)
'educated liberal must go' is the wordplay.
'educated' becomes 'literate' ('literate' can be similar in meaning to 'educated').
'liberal' becomes 'l' (abbreviation).
'must go' suggests deleting specific letters.
'literate' with 'l' taken away is 'ITERATE'.
(Other definitions for iterate that I've seen before include "Say again, repeat" , "Repeat, state again" , "Utter or perform repeatedly" , "Recapitulate" , "State repeatedly, say again" .)