Rising star I left, Lucy's brother (5)

I believe the answer is:

linus

'lucy's brother' is the definition.
(I've seen this in another clue)

'rising star i left' is the wordplay.
'rising' is a reversal indicator (in a down clue, letters go up).
'star' becomes 'sun' (the Sun is a star).
'left' becomes 'l' (common abbreviation).
'sun'+'i'+'l'='sunil'
'sunil' reversed gives 'LINUS'.

(Another definition for linus that I've seen is " Lucy's brother".)

I've seen this clue in The Telegraph.

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