One of those falling for a star starts working out after attention grabbing feat with worker (10)
I believe the answer is:
stuntwoman
'one of those falling for a star starts working out after attention grabbing' is the definition.
I don't know anything about this answer so I can't judge whether it can be defined by this definition.
'feat with worker' is the wordplay.
'feat with' becomes 'stunt' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'worker' becomes 'woman' (woman is a kind of worker).
'stunt'+'woman'='STUNTWOMAN'
Can you help me to learn more?
(Another definition for stuntwoman that I've seen is " one fighting on set, perhaps".)