The outcome of the exercise (5)
I believe the answer is:
sweat
This clue might be a double definition.
'the outcome' is the first definition.
The answer and definition can be both types of natural phenomena as well as being singular nouns.
Maybe you can see an association between them that I don't see?
'the exercise' is the second definition.
The definition and answer can be both acts as well as being singular nouns.
Maybe they are linked in a way I don't understand?
'of' is the link.
Can you help me to learn more?
(Other definitions for sweat that I've seen before include "(Of argument) intense" , "Salty fluid secreted by glands" , "It's hard work" , "Salty fluid secreted by the body" , "Perspire" .)