Trouble editor to cover sailors decorated (7)
I believe the answer is:
adorned
'decorated' is the definition.
('adorn' can be a synonym of 'decorate')
'trouble editor to cover sailors' is the wordplay.
'trouble' becomes 'ado' (I've seen this before).
'editor' becomes 'ed'.
'to cover' means one lot of letters goes inside another.
'sailors' becomes 'rn' (abbreviation for Royal Navy).
'ado'+'ed'='adoed'
'adoed' enclosing 'rn' is 'ADORNED'.
(Other definitions for adorned that I've seen before include "Bedecked while Don read" , "Put on finery" , "done up" , "Decorated, bedecked" , "Embellished, decorated" .)