Confine semi-stout emperor, perhaps (7)
I believe the answer is:
penguin
'semi-stout emperor perhaps' is the definition.
I can't tell whether this definition defines the answer.
'confine' is the wordplay.
I cannot quite understand how this works, but
'confine' could be 'pen' (I've seen this in another clue) and 'pen' is located in the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for penguin that I've seen before include "Chocolate biscuit" , "paperback" , "King or emperor?" , "Flightless marine bird" , "King's an example" .)