Origins of garage and parking space (3)
I believe the answer is:
gap
'space' is the definition.
(gap is a kind of space)
'origins of garage and parking' is the wordplay.
'origins of' suggests taking the first letters.
The initial letters of 'garage and parking' is 'GAP'.
(Other definitions for gap that I've seen before include "Narrow space" , "A small parting, in hedge or teeth" , "Break, in a fence say" , "Break, hole, space" , "A break or opening as in a hedge" .)