Satisfactory beer should be served up for beast (5)
I believe the answer is:
okapi
'for beast' is the definition.
(type of animal)
'satisfactory beer should be served up' is the wordplay.
I cannot really understand how this works, but
'satisfactory' could be 'ok' (similar in meaning) and 'ok' is present in the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for okapi that I've seen before include "Rare mammal" , "African animal related to the giraffe" , "Giraffe-related mammal" , "African leaves fancier" , "They're wild in central Africa" .)