Stab leader leaving dive (5)

I believe the answer is:

lunge

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This could be a double definition.

'stab leader' is the first definition.
'lunge' can be an answer for 'stab' (I've seen this before). I'm not sure about the 'leader' bit.

'dive' is the second definition.
(I've seen this before)

'leaving' is the link.

Can you help me to learn more?

(Other definitions for lunge that I've seen before include "Sudden forward movement" , "sudden movement forwards" , "Sudden move forwards" , "Make a thrusting forward movement" , "Sudden forward motion" .)

I've seen this clue in The Guardian and The Telegraph.

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