Can such a song be enlightening? (5)

I believe the answer is:

torch

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'can such' is the definition.
The answer and definition can be both man-made objects as well as being singular nouns.
Perhaps they are linked in a way I don't understand?

I don't understand the rest of the clue.

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(Other definitions for torch that I've seen before include "A large candle" , "source of illumination" , "Small hand-held battery lamp" , "Deliberately set fire to" , "Link" .)

I've seen this clue in the Evening Standard.

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