Crossword Genius

This last sprite, to a smaller extent, is altruistic (8)

Ross

I believe the answer is:

selfless

'is altruistic' is the definition.
(synonyms)

'this last sprite to a smaller extent' is the wordplay.
'last' suggests the final letters.
'sprite' becomes 'elf' (an elf is a sprite).
'to a smaller extent' becomes 'less' (I've seen this in other clues).
The last letter of 'this' is 's'.
's'+'elf'+'less'='SELFLESS'

(Other definitions for selfless that I've seen before include "Altruistic" , "Generous" , "Considerate" .)

I've seen this clue in the Sydney Morning Herald.
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