Turning bad, nevertheless (5)

I believe the answer is:

still

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'nevertheless' is the definition.
(synonyms)

'turning bad' is the wordplay.
'turning' becomes 'st' (I can't explain this - if you can you should give a lot more credence to this answer).
'bad' becomes 'ill' (associated in meaning).
'st'+'ill'='STILL'

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(Other definitions for still that I've seen before include "source of spirits" , "Not going anywhere" , "Yet - hushed" , "Silence" , "A place to make liquor" .)

I've seen this clue in the Evening Standard.

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