Crossword Genius

Screenwriter's nonsense about field and glen (9)

Ross

I believe the answer is:

bleasdale

I'm a little stuck... Click here to teach me more about this clue!

'screenwriter's nonsense' is the definition.
I know nothing about this answer so I cannot judge whether this works.

'field and glen' is the wordplay.
I cannot really see how this works, but
'field' could be 'lea' (lea can mean a meadow or field of grass) and 'lea' is found within the answer.
'glen' could be 'dale' (I've seen this in another clue) and 'dale' is located in the answer.
This may be the basis of the clue (or it may be nonsense).

'about' is the link.

Can you help me to learn more?

I've seen this clue in The Independent.
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