Put on leg pad, ultimately (6)
I believe the answer is:
staged
'put on' is the definition.
(both can mean fake or affected)
'leg pad ultimately' is the wordplay.
'leg' becomes 'stage' (synonyms).
'ultimately' says to take the final letters.
The final letter of 'pad' is 'd'.
'stage'+'d'='STAGED'
(Other definitions for staged that I've seen before include "Put on as theatre would" , "Performed or produced play" , "Presented a play" , "Put on (as show)" , "Organised (a performance)" .)