I'm unable to comply with prisoner being sent back with nothing (2,3,2)
I believe the answer is:
no can do
'i'm unable to comply' is the definition.
(I've seen this in another clue)
'prisoner being sent back with nothing' is the wordplay.
'prisoner' becomes 'con' (abbreviation for 'convict').
'being sent back' says the letters should be written in reverse.
'with' becomes 'and'.
'nothing' becomes 'O' (looks like zero - 0).
'con' backwards is 'noc'.
'noc'+'and'+'o'='NO CAN DO'
'with' acts as a link.
(Other definitions for no can do that I've seen before include "Nothing manageable" , "Absolutely not!" , "That's not possible" , "off-putting response" , "Can't manage it, see doc anon" .)