Dress material a poet brought back (5)
I believe the answer is:
toile
'dress material' is the definition.
(I've seen this before)
'a poet brought back' is the wordplay.
'a poet' becomes 'Eliot' (TS Eliot).
'brought back' is a reversal indicator.
'eliot' in reverse letter order is 'TOILE'.
(Other definitions for toile that I've seen before include "cheap prototype" , "6 [LINEN]" , "dress material" , "Fabric" , "Worked hard" .)