Pod fell over, perhaps set here? (10)
I believe the answer is:
schoolroom
'perhaps set here?' is the definition.
(set can mean a class)
'pod fell over' is the wordplay.
'pod' becomes 'school' (both can mean a group of marine animals).
'fell' becomes 'moor' (I've seen this before).
'over' shows that the letters should be reversed in order.
'moor' reversed gives 'room'.
'school'+'room'='SCHOOLROOM'
(Other definitions for schoolroom that I've seen before include "Place for classes" , "place of education" , "Place in which we learn" .)