Spend a lot of time on sea trips (8)
I believe the answer is:
passages
'sea trips' is the definition.
The answer and definition can be both acts as well as being plural nouns.
Perhaps there's an association between them I don't understand?
'spend a lot of time on' is the wordplay.
'spend' becomes 'pass' (synonyms).
'a lot of time' becomes 'ages' (I've seen this in another clue).
'on' is a charade indicator (letters next to each other).
'pass'+'ages'='PASSAGES'
Can you help me to learn more?
(Other definitions for passages that I've seen before include "Paths between buildings" , "Narrow streets or routes" , "journeys" , "sections of the speech" , "Corridors, ways through" .)