German golfer breaks clubs with mistakes (8)

I believe the answer is:

clangers

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'mistakes' is the definition.
(I know this)

'german golfer breaks' is the wordplay.
'german' becomes 'cs' (I can't justify this - if you can you should believe this answer much more).
'golfer' becomes 'langer' (Bernhard Langer).
'breaks' is an insertion indicator (inserted letters break into the word).
'cs' enclosing 'langer' is 'CLANGERS'.

'clubs with' acts as a link.
I am not very happy about this link. Some or all of it may belong to another bit of the clue.

Can you help me to learn more?

(Other definitions for clangers that I've seen before include "More than one mistake" , "Embarrassing blunders" , "Drop them and make serious mistakes" .)

I've seen this clue in The Guardian.

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