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For rousing passion, unfinished symphony by Beethoven eclipses his fourth (6)

Ross

I believe the answer is:

erotic

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'for rousing' is the definition.
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(Other definitions for erotic that I've seen before include "love poem" , "Loving composition" , "Calculated to arouse sexual desire" , "Designed to arouse sexual desire" , "Relating to sexual desire" .)

I've seen this clue in The Guardian.
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