Embittered, thus maybe rude (6)

I believe the answer is:

soured

'embittered' is the definition.
(thesaurus)

'thus maybe rude' is the wordplay.
'thus' becomes 'so' (synonyms).
'maybe' indicates anagramming the letters.
'rude' with letters rearranged gives 'ured'.
'so'+'ured'='SOURED'

(Another definition for soured that I've seen is " Made bitter like milk".)

I've seen this clue in the Evening Standard.

Want a hint initially instead of a full solution? Install my app