Laughter heard in bell tower? (4)

I believe the answer is:

peal

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'bell tower?' is the definition.
'peal' can be an answer for 'bell' (thesaurus). I'm unsure of the 'tower?' bit.

I don't understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for peal that I've seen before include "Sound of ringing bells" , "Sound of bells, thunder" , "Chime" , "Loud burst of thunder - or laughter" , "Thunderous roar" .)

I've seen this clue in The Sun.

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