Thief who was bound for America swallows two drugs (10)
I believe the answer is:
prometheus
'thief who was bound' is the definition.
'prometheus' can be an answer for 'thief' (I've seen this in another clue). I am unsure of the rest of the definition.
'for america swallows two drugs' is the wordplay.
'for' becomes 'pro' (as in being 'pro' something).
'america' becomes 'theus' (I've seen this in another clue).
'swallows' indicates putting letters inside.
'two drugs' becomes 'me' (I am not sure about this - if you are sure you should believe this answer much more).
'pro'+'theus'='protheus'
'protheus' placed around 'me' is 'PROMETHEUS'.
Can you help me to learn more?
(Other definitions for prometheus that I've seen before include "Fire-stealing Titan" , "I stole fire" , "Prominent Greek" , "He was bound" , "Gk. hero, gave men fire" .)