Display of passion does the trick (9)
I believe the answer is:
fireworks
'display of passion does the trick' is the definition.
I can't tell whether this definition defines the answer.
'passion does the trick' is the wordplay.
'passion' becomes 'fire' (fire is a kind of passion).
'does the trick' becomes 'works' (I've seen this in another clue).
'fire'+'works'='FIREWORKS'
Can you help me to learn more?
(Other definitions for fireworks that I've seen before include "Display on November 5th etc" , "Pyrotechnics" , "rockets, perhaps" .)