Crossword Genius

Strained fling's great pleasure cut short (5)

Ross

I believe the answer is:

heave

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

'strained fling's' is the definition.
'heave' can be an answer for 'fling's' (I've seen this in another clue). I'm not sure about the 'strained' bit.

I don't understand the remainder of the clue.

Can you help me to learn more?

(Other definitions for heave that I've seen before include "Throw with force - retch" , "Produce (a sigh); lift" , "Tug-of-war cry" , "Haul - retch" , "Throw; haul by rope (naut.)" .)

I've seen this clue in The Telegraph.
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