Want to arrange meeting time: hour put in (8)
I believe the answer is:
shortage
'want' is the definition.
(I know that shortage is a type of want)
'arrange meeting time hour put in' is the wordplay.
'arrange meeting' becomes 'sort' (I can't justify this - if you can you should give a lot more credence to this answer).
'time' becomes 'age' (an age is a period of time).
'hour' becomes 'h'.
'put in' is an insertion indicator.
'sort'+'age'='sortage'
'sortage' placed around 'h' is 'SHORTAGE'.
'to' is the link.
Can you help me to learn more?
(Other definitions for shortage that I've seen before include "Dearth, lack" , "Lack, deficiency" , "Need" , "Horse tag (anag.)" , "Deficit" .)