Maybe Saturday night beginning dangerously with little knowledge in Glasgow (7)
I believe the answer is:
weekend
'maybe saturday night' is the definition.
'beginning dangerously with little knowledge in glasgow' is the wordplay.
'beginning' says to take the initial letters.
'with' says to put letters next to each other.
'little' becomes 'wee' ('wee' can be similar in meaning to 'little').
'knowledge in glasgow' becomes 'ken' (I am not sure about this - if you are sure you should believe this answer much more).
The first letter of 'dangerously' is 'd'.
'wee'+'ken'='weeken'
'd' after 'weeken' is 'WEEKEND'.
(Other definitions for weekend that I've seen before include "time for game?" , "couple of days" , "Sat. and Sun." , "time off work?" , "Occasional" .)