Crossword Genius

One driven mad by Regan and ilk? (4,4)

Ross

I believe the answer is:

king lear

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

'driven mad by regan and ilk?' is the wordplay.
'driven mad by' indicates an anagram.
'and' is a charade indicator (letters next to each other).
'regan'+'ilk'='reganilk'
'reganilk' is an anagram of 'KING LEAR'.

Can you help me to learn more?

(Other definitions for king lear that I've seen before include "One of Shakespeare's tragedies" , "drama" , "Shakespeare's foolish tragic monarch" , "Shakespeare play with storm scene" , "Part of ruler" .)

I've seen this clue in The Guardian.
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