Computer screen maybe shows fine creatures running around (4,9)
I believe the answer is:
user interface
'computer screen maybe' is the definition.
'fine creatures running around' is the wordplay.
'running around' indicates an anagram.
'fine'+'creatures'='finecreatures'
'finecreatures' is an anagram of 'USER INTERFACE'.
'shows' acts as a link.
(Other definitions for user interface that I've seen before include "Communication between computer and operator" , "The UI of GUI" , "Small cucumber" .)