Who's ties turned out most gawdy? (8)

I believe the answer is:

showiest

I'm a little stuck... Click here to teach me more about this clue!

'out most gawdy?' is the definition.
I can't tell whether this defines the answer.

'who's ties turned' is the wordplay.
'turned' indicates an anagram.
'whos'+'ties'='whosties'
'whosties' anagrammed gives 'SHOWIEST'.

Can you help me to learn more?

I've seen this clue in The Times.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.