Slender leak causing squeak (6,6)

I believe the answer is:

narrow escape

'squeak' is the definition.
(I know this)

'slender leak' is the wordplay.
'slender' becomes 'narrow' (similar in meaning).
'leak' becomes 'escape' (I've seen this before).
'narrow'+'escape'='NARROW ESCAPE'

'causing' acts as a link.

(Another definition for narrow escape that I've seen is " Close shave".)

I've seen this clue in The Independent.

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