Place everything over pet enclosure initially (8)
I believe the answer is:
allocate
'place' is the definition.
(thesaurus)
'everything over pet enclosure initially' is the wordplay.
'everything' becomes 'all' (all things).
'over' becomes 'o' (cricket abbreviation).
'pet' becomes 'cat' (cats are often kept as pets).
'initially' suggests taking the first letters.
The first letter of 'enclosure' is 'e'.
'all'+'o'+'cat'+'e'='ALLOCATE'
(Other definitions for allocate that I've seen before include "Assign, distribute" , "Assign or give to, say a duty" , "Deal" , "Assign or apportion" , "award" .)