Crossword Genius

Survives final son (5)

Ross

I believe the answer is:

lasts

'survives' is the definition.
('last' can be a synonym of 'survive')

'final son' is the wordplay.
'final' becomes 'last' ('last' can be a synonym of 'final').
'son' becomes 's'.
'last'+'s'='LASTS'

(Other definitions for lasts that I've seen before include "carries on" , "Keeps on" , "Cobblers' tools" , "Holds out" , "Goes on" .)

I've seen this clue in The Mirror.
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