Information qualified lawyer supplied to gang? It could happen (8)

I believe the answer is:

possible

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'it could happen' is the definition.
The definition suggests a singular noun which matches the answer.

'information qualified lawyer supplied to gang?' is the wordplay.
'information' becomes 'i' (common abbreviation for information).
'qualified lawyer' becomes 'bl' (Bachelor of Law. I am not sure about the 'qualified' bit.).
'supplied to' is an insertion indicator.
'gang?' becomes 'posse' (I've seen this before).
'i'+'bl'='ibl'
'ibl' inserted inside 'posse' is 'POSSIBLE'.

Can you help me to learn more?

(Other definitions for possible that I've seen before include "Feasible achievable" , "Capable of being achieved" , "Conceivable, imaginable" , "Conceivable, practicable" , "Potential" .)

I've seen this clue in The Guardian.

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