Crossword Genius

Strange code, strange etiquette (7)

Ross

I believe the answer is:

decorum

'etiquette' is the definition.
(I've seen this before)

'strange code strange' is the wordplay.
'strange' is an anagram indicator.
'strange' becomes 'rum' (synonyms).
'code' anagrammed gives 'deco'.
'deco'+'rum'='DECORUM'

(Other definitions for decorum that I've seen before include "modesty" , "Correct behaviour" , "Good manners" , "good grace" , "Decency" .)

I've seen this clue in The Telegraph and The Sun.
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