Provide with decorations for a party for sailors (5)
I believe the answer is:
adorn
'provide' is the definition.
(I know this)
'a party for sailors' is the wordplay.
'party' becomes 'do' (do is a kind of party).
'for' says to put letters next to each other.
'sailors' becomes 'RN' (abbreviation for Royal Navy).
'a'+'do'+'rn'='ADORN'
'with decorations for' is the link.
I am not very happy about this link. Some or all of it may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for adorn that I've seen before include "Festoon" , "Improve appearance" , "Embellish, decorate" , "get dressed!" , "Deck" .)