Miscalculate also the commission (6)

I believe the answer is:

errand

'the commission' is the definition.
(I've seen this before)

'miscalculate also' is the wordplay.
'miscalculate' becomes 'err' (I've seen this before).
'also' becomes 'and' (I've seen this before).
'err'+'and'='ERRAND'

(Other definitions for errand that I've seen before include "Short journey to get or carry message" , "run one" , "Short delivery journey" , "Messenger's job" , "purposeful journey" .)

I've seen this clue in The Telegraph.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.