Crossword Genius

Smile as ridiculously lacking in purpose (7)

Ross

I believe the answer is:

aimless

'lacking in purpose' is the definition.
(without aim or purpose)

'smile as ridiculously' is the wordplay.
'ridiculously' is an anagram indicator.
'smile'+'as'='smileas'
'smileas' anagrammed gives 'AIMLESS'.

(Other definitions for aimless that I've seen before include "Without purpose or direction" , "Drifting with no purpose" , "Lacking a goal" , "Without direction or ambition" , "Without purpose or target" .)

I've seen this clue in The Sun.
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