It's The Last Word In Caution.

[satprof]

Alphapuzzle cryptic clue for today from the Sunday Express.

[emmie]

amen

[emmie]

doesn't look right however....

[geevo41]

auction??

[emmie]

stop?

[geevo41]

ion??

[mallyh]

ultimatum?

[satprof]

Geevo : ion is very nice, but there aren't any 3-letter possibilities.

[emmie]

they seem to have mostly short words for their answers?

[emmie]

i thought " stop" as its a last word, and a caution.

[mallyh]

when i use to do this alpha puzzle they did slip a couple of 9s in

[emmie]

difficult one today...

[mallyh]

ultimatum ....a warning usually the last word

[emmie]

could be...

[JJ109]

careful ??? ie be careful!

[emmie]

got us stumped today.... !

[geevo41]

look before you LEAP??

other cautions are available

[furrypusscat]

Evidence - thinking of Police caution!!

[davebro]

STEALTH anagram of the last

[bhg481]

dave - well done.

[satprof]

Unfortunately, 'ultimatum' is too long: no 9-letter grid positions.