Oddly easier having first dealt with revolutionary Big Mac ingredient (9,6)
I believe the answer is:
processed cheese
'oddly easier' is the definition.
I can't judge whether this definition defines the answer.
'first dealt with revolutionary big mac ingredient' is the wordplay.
'first' says to put letters next to each other.
'dealt with' becomes 'processed' (processing is a kind of dealing with).
'revolutionary big mac ingredient' becomes 'cheese' (I can't explain this - if you can you should give a lot more credence to this answer).
'processed' put next to 'cheese' is 'PROCESSED CHEESE'.
'having' is the link.
Can you help me to learn more?
I've seen this clue in The Guardian.
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