It takes time to do so during a trip en masse (5)

I believe the answer is:

ripen

I'm a little stuck... Click here to teach me more about this clue!

'it takes time to do' is the definition.
The definition suggests a singular noun but the answer is not.

'during a trip en masse' is the wordplay.
'during' indicates a hidden word.
'RIPEN' can be found hidden inside 'trip en masse'.

'so' is the link.

Can you help me to learn more?

(Other definitions for ripen that I've seen before include "Get ready to eat" , "Become mature" , "come near to falling" , "Become ready for eating" , "Become ready to eat" .)

I've seen this clue in the Evening Standard.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.