Varadkar shot burrowing mammal (8)
I believe the answer is:
aardvark
'burrowing mammal' is the definition.
(I've seen this in another clue)
'varadkar shot' is the wordplay.
'shot' indicates an anagram.
'varadkar' is an anagram of 'AARDVARK'.
(Other definitions for aardvark that I've seen before include "among Chambers' top words!" , "African mammal with long ears and snout" , "Ant bear" , "African termite feeder" , "African burrowing animal, feeds on termites" .)