Cough and cold remedy, with no top on a jar (7)
I believe the answer is:
amphora
'jar' is the definition.
(I know that jar can be written as amphora)
'cough and cold remedy with no top on a' is the wordplay.
I cannot quite understand how this works, but
'no' could be 'o' (resembles 0 - 'no' can mean 'zero') and 'o' is present in the answer.
'a' could be 'amp' (A is the symbol for the amp or ampere) and 'amp' is found in the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for amphora that I've seen before include "Ancient jar or jug" , "jar from Greece" , "Ancient Greek storage jar" , "Classical jar for storing liquids" , "Ancient Greek or Roman jar with two handles" .)