Slip to accompany task (6)

I believe the answer is:

errand

I'm a little stuck... Click here to teach me more about this clue!

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

'slip to accompany' is the wordplay.
'slip' becomes 'err' (synonyms).
'to accompany' becomes 'and' (I can't explain this - if you can you should believe this answer much more).
'err'+'and'='ERRAND'

Can you help me to learn more?

(Other definitions for errand that I've seen before include "Short trip for a message" , "Journey to deliver message etc" , "Chore" , "Short assignment" , "Native of a former German kingdom" .)

I've seen this clue in The Hindu.

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.