Reserve man of the match space on bus? (8,4)
I believe the answer is:
standing room
'space on bus?' is the definition.
'standing room' can be an answer for 'space' (standing room is a kind of space). I am not sure about the 'on bus?' bit.
'reserve man of the match' is the wordplay.
'reserve' becomes 'standin' (I can't explain this - if you can you should believe this answer much more).
'man of the match' becomes 'groom' (I've seen this before).
'standin'+'groom'='STANDING-ROOM'
Can you help me to learn more?
(Other definitions for standing room that I've seen before include "No seats left (on bus)" , "nowhere to sit" , "No place on bench" , "Where people won't five down [SIT DOWN]" , "Space for upright people?" .)