Ceiling clearance (8)
I believe the answer is:
headroom
(Other definitions for headroom that I've seen before include "vertical space" , "Clearance vertically" , "enough space" , "Clearance below a bridge or ceiling" , "Space available above" .)
I believe the answer is:
headroom
(Other definitions for headroom that I've seen before include "vertical space" , "Clearance vertically" , "enough space" , "Clearance below a bridge or ceiling" , "Space available above" .)