Sort of tram line in part of airport (8)

I believe the answer is:
terminal
'part of airport' is the definition.
The definition and answer can be both man-made objects as well as being singular nouns.
Maybe you can see an association between them that I don't see?
'sort of tram line' is the wordplay.
'sort of' indicates an anagram.
'tram'+'line'='tramline'
'tramline' anagrammed gives 'TERMINAL'.
'in' acts as a link.
Can you help me to learn more?
(Other definitions for terminal that I've seen before include "Occurring at the end" , "Electricity connection point" , "Deadly" , "End point of circuit" , "Passenger building" .)
