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'm not sure about 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 taken off 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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