Crossword Genius

Inferior part - tear into pieces (5-4)

Ross

I believe the answer is:

tenth-rate

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'inferior' is the definition.
I know nothing about this answer so I can't judge whether it can be defined by this definition.

'part tear into pieces' is the wordplay.
'part' becomes 'tenth' (I've seen this before).
'into pieces' indicates an anagram (I've seen this in other clues).
'tear' anagrammed gives 'rate'.
'tenth'+'rate'='TENTH-RATE'

Can you help me to learn more?

I've seen this clue in The Daily Express.
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