Crossword Genius

Cathar chieftain kidnapping Sussex lad (6)

Ross

I believe the answer is:

archie

'sussex lad' is the definition.
(son of duke and duchess of Sussex)

'cathar chieftain kidnapping' is the wordplay.
'kidnapping' says the answer is hidden in the clue.
'ARCHIE' is hidden within 'cathar chieftain'.

I've seen this clue in The Telegraph.
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