Spend long time in corridor (7)
I believe the answer is:
passage
'corridor' is the definition.
(I've seen this before)
'spend long time' is the wordplay.
'spend' becomes 'pass' (synonyms).
'long time' becomes 'age' (an age is a period of time).
'pass'+'age'='PASSAGE'
'in' is the link.
(Other definitions for passage that I've seen before include "street" , "Way through; sea journey" , "Transit - part of book etc" , "Short section of text" , "Piece of writing" .)