Excursion the French go on three times (6)
I believe the answer is:
triple
'three times' is the definition.
(I've seen this before)
'excursion the french' is the wordplay.
'excursion' becomes 'trip' (I've seen this before).
'the french' becomes 'le' ('the' in French).
'trip'+'le'='TRIPLE'
'go on' acts as a link.
This may not be right. Some or all of it may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for triple that I've seen before include "involving several parties" , "Threefold, treble" , "Consisting of three" , "Multiply by three" , "In three parts" .)