New way to face service (6)
I believe the answer is:
modern
'new' is the definition.
(synonyms)
'way to face service' is the wordplay.
'way' becomes 'mode' (synonyms).
'to face' means one lot of letters go next to another.
'service' becomes 'RN' (abbreviation for Royal Navy).
'mode'+'rn'='MODERN'
(Other definitions for modern that I've seen before include "Belonging to the present or recent times" , "See 11" , "'Contemporary, up-to-the-minute (6)'" , "The very latest available" , "Present-day" .)