Remove alcohol? That settles it! (7)

I believe the answer is:

decider

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

'remove alcohol? that settles it' is the definition.
The definition suggests a singular noun which matches the answer.

'remove alcohol?' is the wordplay.
'remove' becomes 'de' (I've seen this in other clues).
'alcohol?' becomes 'cider' (cider is an alcoholic beverage).
'de'+'cider'='DECIDER'

Can you help me to learn more?

(Other definitions for decider that I've seen before include "Important match" , "Result-settling game" , "Extra period of play to settle a draw" , "Settler" , "Clinching game" .)

I've seen this clue in The Sun.

Want a hint initially instead of a full solution? Install my app