Be familiar with each and every smart alec (7)
I believe the answer is:
knowall
'every smart alec' is the definition.
I know nothing about this answer so I can't tell whether it can be defined by this definition.
'be familiar with each' is the wordplay.
'be familiar with' becomes 'know' (I've seen this in another clue).
'each' becomes 'all' (similar in meaning).
'know'+'all'='KNOWALL'
'and' acts as a link.
Can you help me to learn more?
(Other definitions for knowall that I've seen before include "Clever clogs" , "self-appointed expert" , "Cocky type" .)