Personal issue of saline solution (5)
I believe the answer is:
sweat
This could be a double definition.
'personal issue' is the first definition.
The answer and definition can be both acts as well as being singular nouns.
Perhaps you can see a link between them that I can't see?
'saline solution' is the second definition.
Although both the answer and definition are singular nouns, I don't see how one could define the other.
'of' acts as a link.
Can you help me to learn more?
(Other definitions for sweat that I've seen before include "(Of argument) intense" , "Soldier" , "Salty fluid secreted by glands" , "Toil" , "Salty fluid secreted by the body" .)