Crime boss from Britain taken up in Putin's jet (2,3)
I believe the answer is:
mr big
'crime boss' is the definition.
(I've seen this in another clue)
'britain taken up in putin's jet' is the wordplay.
'britain' becomes 'br' (abbreviation).
'taken up' says the letters should be written in reverse.
'in' indicates putting letters inside.
'putin's jet' becomes 'mig' (I can't justify this - if you can you should give a lot more credence to this answer).
'br' in reverse letter order is 'rb'.
'rb' put into 'mig' is 'MR BIG'.
'from' acts as a link.
Can you help me to learn more?
(Other definitions for mr big that I've seen before include "chief" , "Important man" , "boss" , "Top man" .)