Actor carrying bomb to tyrannise? (8)
I believe the answer is:
domineer
'tyrannise?' is the definition.
(synonyms)
'actor carrying bomb' is the wordplay.
'actor' becomes 'doer' (synonyms).
'carrying' means one lot of letters goes inside another.
'bomb' becomes 'mine' (I've seen this before).
'doer' enclosing 'mine' is 'DOMINEER'.
'to' acts as a link.
(Other definitions for domineer that I've seen before include "Dine more and be overbearing" , "behave arrogantly" , "Browbeat" , "Behave imperiously" , "Behave overbearingly" .)