Great performers diminishing Ms West's journey (7)

I believe the answer is:

maestri

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'great performers diminishing ms' is the definition.
I can't judge whether this defines the answer.

'west's journey' is the wordplay.
'west's' becomes 'mae's' (actress Mae West).
'journey' becomes 'tri' (I am not sure about this - if you are sure you should believe this answer much more).
'maes'+'tri'='MAESTRI'

Can you help me to learn more?

(Other definitions for maestri that I've seen before include "great musicians" , "Eminent musical conductors" , "Top conductors" , "Experts" , "Famous conductors" .)

I've seen this clue in The Telegraph.

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