Crossword Genius

Threaten to go out first from Gatwick Express (6)

Ross

I believe the answer is:

gutter

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

'threaten to go out' is the definition.
(I've seen this before)

'gatwick express' is the wordplay.
'gatwick' becomes 'g' (this could be a standard abbreviation which I don't know about).
'express' becomes 'utter' (synonyms).
'g'+'utter'='GUTTER'

'first from' is the 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 gutter that I've seen before include "Channel for carrying off water" , "Channel to carry away rainwater" , "Channel running along the eaves of a building" , "Street channel for carrying off rainwater" , "Where snipe can be found" .)

I've seen this clue in The Times.
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.