Tory holding Liberal ultimately responsible for hacked phone (5)
I believe the answer is:
clone
'hacked phone' is the definition.
(I've seen this before)
'tory holding liberal ultimately responsible' is the wordplay.
'tory' becomes 'con' (abbreviation for Conservative).
'holding' indicates putting letters inside.
'liberal' becomes 'l' (abbreviation).
'ultimately' indicates one should take the final letters.
The last letter of 'responsible' is 'e'.
'con' enclosing 'l' is 'clon'.
'clon'+'e'='CLONE'
'for' acts as a link.
(Other definitions for clone that I've seen before include "eg Dolly the sheep" , "Genetic double" , "Person who is identical to another" , "Exact replica" , "spit" .)