Fellow taking kid aboard yacht (6)
I believe the answer is:
dragon
'aboard yacht' is the definition.
Although both the answer and definition are singular nouns, I cannot see how they can define each other.
'fellow taking kid' is the wordplay.
'fellow' becomes 'don' (I've seen this before).
'taking' indicates putting letters inside.
'kid' becomes 'rag' (I've seen this in other clues).
'don' placed around 'rag' is 'DRAGON'.
Can you help me to learn more?
(Other definitions for dragon that I've seen before include "Fail tediously to conclude" , "dangerous creature?" , "Monster - type of fly" , "Mythical flying creature killed by St George" , "[TERMAGANT]" .)