Second receptacle hummed (5)

'hummed' is the definition.
(hum can mean to stink)

'second receptacle' is the wordplay.
I cannot quite see how this works, but
'second' could be 's' (common abbreviation) and 's' is found in the answer.
The remaining letters 'tank' is a valid word which might be clued in a way I don't understand.
This may be the basis of the clue (or it may be nonsense).

Can you help me to learn more?