Is it entered by shipping agent on order? (7)
I believe the answer is:
tonnage
'is it entered by shipping' is the definition.
I can't tell whether this defines the answer.
'agent on order?' is the wordplay.
'order?' indicates anagramming the letters (I've seen 'ordering' mean this).
'agent'+'on'='agenton'
'agenton' with letters rearranged gives 'TONNAGE'.
Can you help me to learn more?
(Other definitions for tonnage that I've seen before include "Weight of cargo - ship's carrying capacity" , "Measure of cargo space" , "Ship's size or carrying capacity" , "Capacity of ship" , "No agent (anag)" .)