Friendly time on board yacht at sea (6)
I believe the answer is:
chatty
'friendly' is the definition.
Both the answer and definition are adjectives. Maybe they are linked in a way I don't understand?
'time on board yacht at sea' is the wordplay.
'time' becomes 't' (abbreviation).
'on board' is an insertion indicator (inserted letters are taken on board).
'at sea' is an anagram indicator.
'yacht' anagrammed gives 'chaty'.
't' going inside 'chaty' is 'CHATTY'.
Can you help me to learn more?
(Other definitions for chatty that I've seen before include "Full of (trivial) conversation" , "Prone to gossip" , "Talkative or garrulous" , "Communicative" , "Loquacious" .)