Doctor, say, close to bottles and what's left of drinks? (5)
I believe the answer is:
dregs
'what's left of drinks?' is the definition.
I can't judge whether this definition defines the answer.
'doctor say close to bottles' is the wordplay.
'doctor' becomes 'Dr' (abbreviation).
'say' becomes 'eg' (both can mean 'for example').
'close to' suggests the final letters (the close/ending of).
The final letter of 'bottles' is 's'.
'dr'+'eg'+'s'='DREGS'
'and' acts as a link.
Can you help me to learn more?
(Other definitions for dregs that I've seen before include "Sediment at bottom of drink" , "Parts of least value" , "Wine sediment" , "Grounds; refuse" , "Remaining sediment" .)