The drinkable rain is trapped and you can take it with you (8)
I believe the answer is:
portable
'you can take it with you' is the definition.
I can't judge whether this definition defines the answer.
'the drinkable rain is trapped' is the wordplay.
'the drinkable' becomes 'potable' (I've seen this before).
'rain' becomes 'r' (this could be a standard abbreviation of which I'm unaware).
'is trapped' means one lot of letters goes inside another.
'potable' going around 'r' is 'PORTABLE'.
'and' acts as a link.
Can you help me to learn more?
(Other definitions for portable that I've seen before include "radio" , "Laptop, for example" , "Handy - lightweight" , "Easily transported" , "desirable type of pension" .)