Does the peach ensemble badly need to be marked down? (9)

'does the peach ensemble' is the definition.
I can't tell whether this defines the answer.

'badly need to be marked down?' is the wordplay.
'badly' is an anagram indicator (letters in the wrong order).
'to' says to put letters next to each other (I've seen this in other clues).
'be marked down?' becomes 'cheap' (I can't explain this - if you can you should believe this answer much more).
'need' anagrammed gives 'ened'.
'ened' after 'cheap' is 'CHEAPENED'.

Can you help me to learn more?