Sweet medication in water perhaps is served up (8)
I believe the answer is:
lollipop
'sweet' is the definition.
(lollipop is a kind of sweet)
'medication in water perhaps is served up' is the wordplay.
'medication' becomes 'pill' (pill is a kind of medication).
'in' indicates putting letters inside.
'water perhaps' becomes 'pool' (pool is a kind of water. I am not sure about the 'perhaps' bit.**).
'is served up' says the letters should be written backwards.
'pill' inserted inside 'pool' is 'popillol'.
'popillol' written backwards gives 'LOLLIPOP'.
Can you help me to learn more?
(Other definitions for lollipop that I've seen before include "Sweet on a stick" , "Sweet; popular work" , "Boiled sweet" , "Candy on a stick" , "Woman seeing children safely across the road" .)