Trains on time, household items transported in one? (3,5)
I believe the answer is:
'household items transported in one?' is the definition.
I can't tell whether this definition defines the answer.
'trains on time' is the wordplay.
'trains' becomes 'teaches' (I've seen this before).
'on' means one lot of letters go next to another.
'time' becomes 't' (abbreviation).
Can you help me to learn more?
(Other definitions for tea chest that I've seen before include "Crate (much used in moving house)" , "case for move" , "Foil-lined wooden box" , "Holder of leaves for brewing?" , "Item famously thrown overboard" .)