A long line to book soldiers on time share (9)
I believe the answer is:
allotment
'share' is the definition.
(allotment is a kind of share)
'a long line to book soldiers on time' is the wordplay.
'long' becomes 'l'.
'line' becomes 'l' (used when specifying particular lines from a poem).
'to book' becomes 'ot' (Old Testament).
'soldiers on' becomes 'men' (men can mean a group of soldiers. I am not sure about the 'on' bit.).
'time' becomes 't' (abbreviation).
'a'+'l'+'l'+'ot'+'men'+'t'='ALLOTMENT'
Can you help me to learn more?
(Other definitions for allotment that I've seen before include "Plot of land rented for growing vegetables" , "Where vegetables may be produced" , "Rented piece of ground" , "Share - small piece of land rented for cultivation" , "growing area?" .)