As pickpocket maybe faint, being identified to police (5-8)
I believe the answer is:
light-fingered
'as pickpocket' is the definition.
I can't tell whether this defines the answer.
'faint being identified to police' is the wordplay.
I cannot quite understand how this works, but
'faint' could be 'light' and 'light' is found within the answer.
'being' could be 'red' (red is a kind of being) and 'red' is located in the answer.
This explanation may well be incorrect...
'maybe' acts as a link.
Can you help me to learn more?
(Other definitions for light-fingered that I've seen before include "Likely to steal" , "Prone to steal" , "Given to thieving" , "Liable to steal" , "Adept at thieving" .)