Plenty of room for a speed contest? (5,4)
I believe the answer is:
space race
'plenty' is the definition.
I know nothing about this answer so I cannot judge whether this works.
'room for a speed contest?' is the wordplay.
'room' becomes 'space' (I've seen this before).
'for' says to put letters next to each other.
'a speed contest?' becomes 'race' (I've seen this before).
'space'+'race'='SPACE RACE'
'of' is the link.
Can you help me to learn more?
(Another definition for space race that I've seen is " Aerial competition".)