Mean, I am likely to pocket a note (6)
I believe the answer is:
intend
'mean' is the definition.
(to intend to something is to mean it)
'i am likely to pocket a note' is the wordplay.
'am likely to' becomes 'tend' (if I tend to do something I'm more likely to do it).
'pocket' indicates putting letters inside.
'a note' becomes 'n' (abbreviation).
'i'+'tend'='itend'
'itend' going around 'n' is 'INTEND'.
(Other definitions for intend that I've seen before include "Mean - purpose" , "Have as purpose or resolve" , "Have as purpose or in mind" , "Plan, propose" , "Mean; aim" .)