God starts to punish lying, untrustworthy, thieving oligarchs (5)
I believe the answer is:
pluto
'god' is the definition.
(I've seen this before)
'starts to punish lying untrustworthy thieving oligarchs' is the wordplay.
'starts to' suggests taking the first letters.
The initial letters of 'punish lying untrustworthy thieving oligarchs' is 'PLUTO'.
(Other definitions for pluto that I've seen before include "Planet discovered in 1930" , "Solar System's smallest planet" , "Disney dog - planet" , "Long-haul destination" , "heavenly body" .)