Opening performance with smelly trick (5)
I believe the answer is:
prank
'trick' is the definition.
(synonyms)
'opening performance with smelly' is the wordplay.
'opening' says to take the initial letters.
'with smelly' becomes 'rank' (I am not sure about this - if you are sure you should believe this answer much more).
The first letter of 'performance' is 'p'.
'p'+'rank'='PRANK'
Can you help me to learn more?
(Other definitions for prank that I've seen before include "Practical joke or trick" , "Lark" , "Escapade" , "(Amusing) trick" , "Jape" .)