Old Peruvian ancestry shining brightly (12)

I believe the answer is:

incandescent

'shining brightly' is the definition.

'old peruvian ancestry' is the wordplay.
'old peruvian' becomes 'incan' (I've seen this before).
'ancestry' becomes 'descent' (descent is a kind of ancestry).
'incan'+'descent'='INCANDESCENT'

(Other definitions for incandescent that I've seen before include "Glowing hot" , "Glowing brightly" , "frenzied ..." , "Dazzling" , "Mad" .)

I've seen this clue in The Times.

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