Crossword Genius

Beneficial though self-contradictory in parts (9)

Ross

I believe the answer is:

wholesome

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

'beneficial' is the definition.
(I've seen this before)

'self-contradictory in parts' is the wordplay.
I cannot quite see how this works, but
'parts' could be 'holes' (hole is a kind of part) and 'holes' is present in the answer.
This may be the basis of the clue (or it may be nonsense).

'though' is the link.

Can you help me to learn more?

(Other definitions for wholesome that I've seen before include "Respectable" , "Previously propitious" , "Beneficial" , "Healthy in body, taste or morals" , "Good for you!" .)

I've seen this clue in The Globe and Mail.
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