Trips on the River Loire (5)
I believe the answer is:
tours
'trips' is the definition.
(I know this)
'on the river loire' is the wordplay.
'on' is a charade indicator (letters next to each other).
'the' becomes 't' (the is pronounced as a 't' sound in some dialects).
'river loire' becomes 'ours' (I can't justify this - if you can you should give a lot more credence to this answer).
't' next to 'ours' is 'TOURS'.
Can you help me to learn more?
(Other definitions for tours that I've seen before include "French city" , "French town" , "Martin's home" , "Capital of France's Indre-et-Loire department" , "Excursions" .)