Its tea can run out! (3)
I believe the answer is:
urn
'its tea' is the definition.
I can't tell whether this defines the answer.
'run out' is the wordplay.
'out' indicates anagramming the letters (out can mean wrong or inaccurate).
'run' anagrammed gives 'URN'.
'can' is the link.
Can you help me to learn more?
(Other definitions for urn that I've seen before include "Large container, for tea say" , "Run to get funeral vase" , "Run to get Greek vase" , "Large pot for coffee or tea" , "Spore-producing capsule of a moss" .)