Ethical person increasingly cut down celebrity (8)

I believe the answer is:

moralist

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

'ethical person' is the definition.
'moralist' can be an answer for 'person' (moralist is a kind of person). I am unsure of the 'ethical' bit.

'increasingly cut down celebrity' is the wordplay.
'increasingly' becomes 'more'.
'cut down' means to remove the last letter.
'celebrity' becomes 'a-list' (I've seen this before).
'more' with its last letter removed is 'mor'.
'mor'+'alist'='MORALIST'

Can you help me to learn more?

(Other definitions for moralist that I've seen before include "One teaching right and wrong" , "Good teacher" , "Ail storm (anag)" , "Disciplinarian" , "puritan" .)

I've seen this clue in The Independent.

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