Rotten piece of job advice (3)

I believe the answer is:

bad

'rotten' is the definition.
(similar in meaning)

'piece of job advice' is the wordplay.
'piece of' indicates a hidden word.
'BAD' can be found hidden inside 'job advice'.

(Other definitions for bad that I've seen before include "SECOND HALF OF 16" , "Spoiled or evil" , "(Of food) decayed" , "Substandard" , "Severe; of low standard" .)

I've seen this clue in the Evening Standard.

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