Sort of tin can or bottle, ultimately - this? (9)
I believe the answer is:
container
'this?' is the definition.
The definition suggests a singular noun which matches the answer.
'sort of tin can or bottle ultimately' is the wordplay.
'sort of' indicates an anagram.
'ultimately' indicates one should take the final letters.
The final letter of 'bottle' is 'e'.
'tin'+'can'+'or'+'e'='tincanore'
'tincanore' anagrammed gives 'CONTAINER'.
Can you help me to learn more?
(Other definitions for container that I've seen before include "Large shipping box" , "Sort of ship" , "Something that holds" , "Something to hold" , "Eg, box" .)