Crossword Genius

Sending back trifle once sick (10)

Ross

I believe the answer is:

reflection

'sending back' is the definition.
(reflect can mean to send back or reverse)

'trifle once sick' is the wordplay.
'sick' indicates an anagram.
'trifle'+'once'='trifleonce'
'trifleonce' with letters rearranged gives 'REFLECTION'.

(Other definitions for reflection that I've seen before include "Mirror image" , "mental study's required" , "serious thought?" , "Effect of not absorbing light" .)

I've seen this clue in The Telegraph.
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