Solution for 3 May cryptic crossword clue

Extra charge made by a key teacher at university (3-2)

Solution – Add-on

You will see that the letters in the solution have a hyphen between them rather than a comma.  This tells you that the answer is a hyphenated word rather than a phrase.

Extra charge made= add-on

A key = ad (d being a key in music) + don = name for a university lecturer particularly in the UK


This is a charades clue which also includes an abbreviation.