Bedlam - an unstable type that's unpleasant (8)

I believe the answer is:

damnable

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'type that's unpleasant' is the definition.
I can't tell whether this definition defines the answer.

'bedlam an unstable' is the wordplay.
'unstable' indicates anagramming the letters.
'bedlam'+'an'='bedlaman'
'bedlaman' is an anagram of 'DAMNABLE'.

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(Other definitions for damnable that I've seen before include "Pernicious" , "Awful" , "offensive" , "Atrocious, infernal" , "Execrable" .)

I've seen this clue in the Irish Times and the Irish Times (Crosaire).

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