Place for spectators, barely emptied, is ready for future use (5-2)
I believe the answer is:
stand-by
'future use' is the definition.
Although both the answer and definition are verbs in their base form, I cannot understand how one could define the other.
'place for spectators barely emptied is ready' is the wordplay.
I cannot really see how this works, but
'place' could be 'stand' (standing is a kind of placing) and 'stand' is found within the answer.
The remaining letters 'by' is a valid word which might be clued in a way I don't understand.
This may be the basis of the clue (or it may be nonsense).
'for' is the link.
Can you help me to learn more?
(Other definitions for stand-by that I've seen before include "Quiescent state" , "Something kept in readiness" .)