It takes a turn for the better (8)
'it' is the definition.
The definition suggests a singular noun which matches the answer.
'a turn for the better' is the wordplay.
'a turn' becomes 'wheel' (I've seen this before).
'for' says to put letters next to each other (I've seen this in other clues).
'the better' becomes 'roulette' (I can't justify this - if you can you should believe this answer much more).
'wheel' after 'roulette' is 'ROULETTE WHEEL'.
'takes' is the link.
Can you help me to learn more?
(Another definition for roulette wheel that I've seen is " It spins in the casino".)
'better' is the definition.
Although both the answer and definition are singular nouns, I can't see how one could define the other.
'it takes a turn for the' is the wordplay.
I cannot really see how this works, but
'it' could be 't' (abbreviation. e.g. in 'tis) and 't' is present in the answer.
'turn' could be 'u' (a 'U-turn' is a kind of turn) and 'u' is located in the answer.
'the' could be 't' (the is pronounced as a 't' sound in some dialects) and 't' is found within the answer.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for roulette that I've seen before include "SPORT/GAME" , "Casino game" , "it's for the better, supposedly" , "If Russian, it's a very dangerous game" , "Wheel of fortune" .)