Crossword Genius

Singular rotundity and thickset build (10)

Ross

I believe the answer is:

stubbiness

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

This might be a double definition.

'singular rotundity' is the first definition.
The answer and definition can be both human attributes as well as being singular nouns.
Perhaps they are linked in a way I don't understand?

'thickset build' is the second definition.
The answer and definition can be both human attributes as well as being singular nouns.
Maybe they are linked in a way I don't understand?

'and' acts as a link.

Can you help me to learn more?

I've seen this clue in The Times.
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