Wild animal makes Robert act desperately (6)
I believe the answer is:
bobcat
'wild animal' is the definition.
(I've seen this before)
'robert act desperately' is the wordplay.
'robert' becomes 'bob' (short for Robert).
'desperately' indicates anagramming the letters.
'act' is an anagram of 'cat'.
'bob'+'cat'='BOBCAT'
'makes' is the link.
(Other definitions for bobcat that I've seen before include "A sort of lynx" , "Relation of the lynx" , "Wild animal" , "Small lynx of Norht America" , "Bay lynx" .)