Tramp's son turned out to be an outdoor type (9)
I believe the answer is:
sportsman
'an outdoor type' is the definition.
The answer and definition can be both people as well as being singular nouns.
Perhaps you can see an association between them that I can't see?
'tramp's son turned out' is the wordplay.
'turned out' indicates anagramming the letters (turn out can mean to organise).
'tramps'+'son'='trampsson'
'trampsson' is an anagram of 'SPORTSMAN'.
'to be' acts as a link.
Can you help me to learn more?
(Other definitions for sportsman that I've seen before include "Chap aiming for game" , "Male athlete" , "Rower perhaps" , "Game fellow" , "player" .)