Comical, aisle concealing port (6)
I believe the answer is:
calais
'port' is the definition.
(I've seen this before)
'comical aisle concealing' is the wordplay.
'concealing' indicates a hidden word.
'CALAIS' can be found hidden inside 'comical aisle'.
(Other definitions for calais that I've seen before include "French port opposite Dover" , "French port for ferry to England" , "Mary Tudor said it would be found "lying in my heart"" , "A ferry port in northern France" , "Northern French port" .)