Scruffy lie-abeds let themselves down (8)

I believe the answer is:

abseiled

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'scruffy lie-abeds let themselves down' is the definition.
I can't judge whether this defines the answer.

'scruffy lie-abeds' is the wordplay.
'scruffy' indicates anagramming the letters.
'lie'+'abeds'='lieabeds'
'lieabeds' with letters rearranged gives 'ABSEILED'.

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(Other definitions for abseiled that I've seen before include "descended using rope" , "Daringly dropped" , "Lowered oneself with a rope from a mountain" , "Descended rock face" .)

I've seen this clue in The Sunday Times and The Times.

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