Extremely faithful guide is better endowed (7)

I believe the answer is:

flusher

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

'is better endowed' is the definition.
I can't judge whether this definition defines the answer.

'extremely faithful guide' is the wordplay.
'extremely' suggests removing the centre (only the extremes of the word are used).
'guide' becomes 'usher' (an usher guides people).
'faithful' with its middle taken out is 'fl'.
'fl'+'usher'='FLUSHER'

Can you help me to learn more?

I've seen this clue in The Irish 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.