Current advice in recession, sell? Don't be dumb (4,2,3)
I believe the answer is:
spit it out
'don't be dumb' is the definition.
I don't know anything about this answer so I cannot judge whether it can be defined by this definition.
'current advice in recession sell?' is the wordplay.
'current' becomes 'I' (symbol for electric current).
'advice' becomes 'tips' (I've seen this in another clue).
'in recession' says the letters should be written in reverse (letters recede or go back).
'sell?' becomes 'tout' (to tout something is to sell it).
'i'+'tips'='itips'
'itips' written backwards gives 'spiti'.
'spiti'+'tout'='SPIT IT OUT'
Can you help me to learn more?
(Other definitions for spit it out that I've seen before include "Say it quickly - even expectorate" , "Come on, say what you think - expectorate" , "Tell me forthwith!"" , "Say what one has to say" , "Come on, say what's on your mind - expectorate if you wish" .)