A step up from manager is error (5)

I believe the answer is:

riser

'a step up' is the definition.
(I've seen this before)

'from manager is error' is the wordplay.
'from' indicates the answer is hidden within the clue.
'RISER' can be found hidden inside 'manager is error'.

(Other definitions for riser that I've seen before include "Stair front" , "A bit of a flight" , "He gets up" , "Front of a step; vertical pipe" , "Pipe for upward flow" .)

I've seen this clue in The Telegraph.

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