One match should last him a lifetime (10)
I believe the answer is:
monogamist
This clue could be a double definition.
'one match' is the first definition.
The answer and definition can be both people as well as being singular nouns.
Maybe you can see a link between them that I can't see?
'should last him a lifetime' is the second definition.
The answer is a person as well as being a singular noun. This is suggested by the definition.
Can you help me to learn more?
(Other definitions for monogamist that I've seen before include "Reliable partner" , "Person with a single mate" , "Advocate of having only one spouse at a time" .)