The most common and most likely answer to this crossword clue is the 3 plus 2 letter word RAT ON
I've seen this crossword clue in The Guardian
R
A
T
O
N
More clues leading to the result RAT ON
- Shop returned waterproof coat missing
- Desert allotment with no source of irrigation
- Divulge private information about ration one spurned
- Shop owner’s ending with a huge amount
- Betray Resistance straightaway when abandoned by Church
- Two characters going after 1in shop
- Act as The Informer in part allocated selflessly
- Shop displaying five scores by the Gunners
- Betray public official, almost retired
- Betray no sailor in uprising
Buddy explains!
The straight part
We know that "Act as The Informer" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case act as the informer = rat on.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.