Crossword Genius

Altered lie by misbehaving on purpose (12)

Ross

I believe the answer is:

deliberately

'on purpose' is the definition.
(synonyms)

'altered lie by misbehaving' is the wordplay.
'misbehaving' indicates an anagram.
'altered'+'lie'+'by'='alteredlieby'
'alteredlieby' anagrammed gives 'DELIBERATELY'.

(Other definitions for deliberately that I've seen before include "as intended" , "On purpose" , "Consciously and intentionally" .)

I've seen this clue in The Telegraph.
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