What could turn Hard Left, keen to adopt terms of Corbyn and lunatic fringe (8,6)
I believe the answer is:
portland cement
'lunatic fringe' is the definition.
Although both the answer and definition are singular nouns, I can't understand how one could define the other.
'what could turn hard left keen to adopt terms of corbyn and' is the wordplay.
I cannot quite understand how this works, but
'turn' could be 't' (abbreviation in Oxford Dictionary of Abbreviations) and 't' is present in the answer.
'left' could be 'l' (common abbreviation) and 'l' is found in the answer.
'of' could be 'o' and 'o' is found within the answer.
'and' could be 'n' (common abbreviation for 'and') and 'n' is located in the answer.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for portland cement that I've seen before include "hard stuff!" , "Bond" , "Material for building" .)