Aisle? Clear a path! (7)
I believe the answer is:
gangway
'aisle?' is the definition.
(I know that gangway is a aisle)
'clear a path' is the wordplay.
'clear' becomes 'gang' (I can't justify this - if you can you should give a lot more credence to this answer).
'a path' becomes 'way' (way is a kind of path).
'gang'+'way'='GANGWAY'
Can you help me to learn more?
(Other definitions for gangway that I've seen before include "Let us get past" , "Movable bridge from ship to land" , "means to secure passage on ship" , "Aisle between seats" , "part of ship" .)