Gather 'frisky' college dons do one! (7)
I believe the answer is:
gertcha
'do one' is the definition.
I know nothing about this answer so I cannot tell whether it can be defined by this definition.
'gather frisky college dons' is the wordplay.
'frisky' indicates an anagram.
'college' becomes 'c'.
'dons' means one lot of letters goes inside another (inserted letters wear or 'don' others).
'gather' anagrammed gives 'gertha'.
'gertha' placed around 'c' is 'GERTCHA'.
Can you help me to learn more?
(Other definitions for gertcha that I've seen before include "Kindly leave" , "get lost" .)