Spend lots of time in corridors (8)
I believe the answer is:
passages
'corridors' is the definition.
(I've seen this before)
'spend lots of time' is the wordplay.
'spend' becomes 'pass' (synonyms).
'lots of time' becomes 'ages'.
'pass'+'ages'='PASSAGES'
'in' is the link.
(Other definitions for passages that I've seen before include "Narrow streets or routes" , "journeys" , "Texts" , "sections of the speech" , "Paths between buildings" .)