New fashioned service (6)
I believe the answer is:
modern
'new' is the definition.
(associated in meaning)
'fashioned service' is the wordplay.
'fashioned' becomes 'mode' (I can't justify this - if you can you should give a lot more credence to this answer).
'service' becomes 'rn' (abbreviation for Royal Navy).
'mode'+'rn'='MODERN'
Can you help me to learn more?
(Other definitions for modern that I've seen before include "See 11" , "Belonging to the present or recent times" , "Novel" , "Present-day" , "Recent, up to date" .)