Solid or, sadly, broken (6)

I believe the answer is:

robust

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'solid' is the definition.
Both the definition and answer are adjectives. Perhaps you can see an association between them that I don't see?

'or sadly broken' is the wordplay.
'sadly' indicates anagramming the letters.
'broken' becomes 'bust' (bust can mean broken).
'or' is an anagram of 'ro'.
'ro'+'bust'='ROBUST'

Can you help me to learn more?

(Other definitions for robust that I've seen before include "Having a strong constitution" , "Sturdy, resilient" , "Stout" , "Athletic" , "Study and durable" .)

I've seen this clue in The Mirror.

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