Slip up and trip (6)

I believe the answer is:

errand

'trip' is the definition.
(I know that errand is a type of trip)

'slip up and' is the wordplay.
'slip up' becomes 'err' (to err is to make an error).
'err'+'and'='ERRAND'

(Other definitions for errand that I've seen before include "A short journey to deliver orget goods" , "Short trip for a message" , "Commission, message" , "Journey to deliver message etc" , "A little job" .)

I've seen this clue in The Telegraph.

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