Print extract from Mandelstam poetry (5)
I believe the answer is:
stamp
'print' is the definition.
(thesaurus)
'extract from mandelstam poetry' is the wordplay.
'extract from' indicates the answer is hidden within the clue (I've seen this in other clues).
'STAMP' can be found hidden inside 'mandelstam poetry'.
(Other definitions for stamp that I've seen before include "Imprinted mark" , "Seal" , "Tread heavily (on an envelope?)" , "Bang foot down; (house sale) duty" , "Validation for a letter - tread heavily" .)