Crossword Genius

P's out of training? (4)

Ross

I believe the answer is:

soft

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'out of training?' is the definition.
(thesaurus)

I don't understand the remainder of the clue.

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(Other definitions for soft that I've seen before include "Cushy, not tough" , "(Of drink) not alcoholic" , "Gentle - simple" , "Velvety" , "Yielding; quiet" .)

I've seen this clue in The Telegraph.
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