Short part with fuel may cause explosion (5-2)
I believe the answer is:
flare-up
'explosion' is the definition.
(thesaurus)
'short part with fuel' is the wordplay.
I cannot really understand how this works, but
'part' could be 're' (re is a kind of part) and 're' is found in the answer.
This may be the basis of the clue (or it may be nonsense).
'may cause' is the link.
Can you help me to learn more?
(Other definitions for flare-up that I've seen before include "Sudden outbreak (of violence, etc)" , "Suddenly get angry" , "Burst into flame or become suddenly angry" , "Sudden outbreak of anger" , "Sudden burst of light" .)