Displays with decorations navy's presented followed song and dance (6)
I believe the answer is:
adorns
'displays' is the definition.
The answer and definition can be both to do with social activities as well as being verbs in their -s form.
Perhaps there's a link between them I don't understand?
'decorations navy's presented followed song and dance' is the wordplay.
'decorations' becomes 'r' (I am not sure about this - if you are sure you should believe this answer much more).
'navy's' becomes 'ns' (common abbreviation eg in RN Royal Navy).
'presented' is a charade indicator (letters next to each other).
'followed' is a charade indicator (letters next to each other).
'song and dance' becomes 'ado' (I've seen this before).
'r' put next to 'ns' is 'rns'.
'rns' after 'ado' is 'ADORNS'.
'with' is the link.
Can you help me to learn more?
(Other definitions for adorns that I've seen before include "'Decorates, embellishes (6)'" , "Decorates with ornaments" , "Bedecks" , "decks" , "Adds ornamentation" .)