Crossword Genius

Clumsy bell-ringer was so tactless! (7,1,7)

Ross

I believe the answer is:

dropped a clanger

I'm a little stuck... Click here to teach me more about this clue!

'so tactless' is the definition.
I know nothing about this answer so I cannot judge whether it can be defined by this definition.

'clumsy bell-ringer' is the wordplay.
I cannot quite understand how this works, but
'bell' could be 'clanger' (I've seen this before) and 'clanger' is present in the answer.
This explanation may well be incorrect...

'was' is the link.

Can you help me to learn more?

I've seen this clue in the Sydney Morning Herald.
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