Sweat as our time's run out (8)
I believe the answer is:
moisture
'sweat' is the definition.
The answer and definition can be both states of affairs as well as being singular nouns.
Maybe you can see an association between them that I don't see?
'our time's run out' is the wordplay.
'our time's' can be anagrammed to 'MOISTURE'.
Though, I'm not sure how the anagram is indicated.
'as' is the link.
Can you help me to learn more?
(Other definitions for moisture that I've seen before include "Liquid in vapour or spray form" , "Liquid in small quantity, in the air say" , "Wetness caused by water" , "Liquid, in drops perhaps" , "Diffused liquid such as vapour or condensation" .)