Crossword Genius

Head of sports club is to speak rapidly and indistinctly (7)

Ross

I believe the answer is:

sputter

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

'to speak rapidly and indistinctly' is the definition.
I can't judge whether this defines the answer.

'head of sports club' is the wordplay.
'head of' indicates taking the first letters.
'club' becomes 'putter' (a golf club).
The initial letter of 'sports' is 's'.
's'+'putter'='SPUTTER'

'is' acts as a link.

Can you help me to learn more?

(Other definitions for sputter that I've seen before include "Blurt out" , "come out in bursts" , "Make series fo quick explosive sounds, like sick engine" .)

I've seen this clue in The Independent.
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