Display power when you include the fruit drink (4,1,5)
I believe the answer is:
pack a punch
'display power when you include the fruit' is the definition.
I don't know anything about this answer so I can't judge whether it can be defined by this definition.
'drink' is the wordplay.
I cannot quite see how this works, but
'drink' could be 'punch' (punch is an alcoholic drink) and 'punch' is located in the answer.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for pack a punch that I've seen before include "have powerful effect" , "make a strong impression?" , "Take a magazine" , "What travelling puppeteer may do" , "Be capable of hitting with force" .)