cryptic

[endanger]

'He might have mentioned it in passing once' 7 letters. third letter 't'
many thanks
E

[dr john]

Tricky. It might help to know which crossword it comes from. Any other letters?

[endanger]

sorry my friend got it from a paper not sure which
no other letters as yet
E

[kayakamina]

Good morning E.

I've been staring at this for 15 minutes with increasing frustration!
Can you give us the detail of any interlocking clues that may provide some letters so we can solve this?

Regards K

[endanger]

sorry K - that is all I was given (not very helpful, I know)
Regards
E