New fashion for the silent service (6)

I believe the answer is:

modern

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'new' is the definition.
(associated in meaning)

'fashion for the silent service' is the wordplay.
'fashion' becomes 'mode' (synonyms).
'for' says to put letters next to each other.
'the silent service' becomes 'rn' (abbreviation for Royal Navy. I am not sure about the 'silent' bit.).
'mode'+'rn'='MODERN'

Can you help me to learn more?

(Other definitions for modern that I've seen before include "Of the present time or current fashion" , "See 11" , "Activity of 18 ac" , "Fashionable (like the new Tate gallery?)" , "In history, the period or era since the Middle Ages" .)

I've seen this clue in the Evening Standard.

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