Ball boy's first final (5)

I believe the answer is:

blast

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

'ball' is the definition.
The answer and definition can be both acts as well as being singular nouns.
Maybe you can see a link between them that I don't see?

'boy's first final' is the wordplay.
'boy's first' becomes 'b' (1st letter of 'boy').
'final' becomes 'last' (synonyms).
'b'+'last'='BLAST'

Can you help me to learn more?

(Other definitions for blast that I've seen before include "Damn - explosion" , "Great time: explosion" , "Blow up or swear" , "Loud horn sound" , "Explosion - mild oath" .)

I've seen this clue in The Daily Express.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.