Possibly start of a fire in parks (5)
I believe the answer is:
spark
This clue might be a double definition.
'possibly start' is the first definition.
The definition and answer can be both human attributes as well as being singular nouns.
Maybe there's an association between them I don't understand?
'fire in parks' is the second definition.
'spark' can be an answer for 'fire' (thesaurus). I'm not sure about the 'in parks' bit.
'of a' acts as a link.
Can you help me to learn more?
(Other definitions for spark that I've seen before include "Fiery particle" , "Glowing particle" , "Quantity of electricity" , "bit of fire?" , "Electrical discharge" .)