Indoor transport (8)
I believe the answer is:
entrance
'transport' is the definition.
(I've seen this before)
I cannot understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for entrance that I've seen before include "Coming upon stage - fill with rapturous delight" , "Way in - fascinate" , "Carry away" , "Maybe drive" , "arrival" .)