Crossword Genius

Smashing spindle damaged daughter (8)

Ross

I believe the answer is:

splendid

'smashing' is the definition.
(thesaurus)

'spindle damaged daughter' is the wordplay.
'damaged' is an anagram indicator.
'daughter' becomes 'd' (genealogical abbreviation).
'spindle' with letters rearranged gives 'splendi'.
'splendi'+'d'='SPLENDID'

(Other definitions for splendid that I've seen before include "Characterised by grandeur" , "super" , "Grand" , "Very fine, glorious" , "Excellent, magnificent" .)

I've seen this clue in The Sun.
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