Decent restaurant rejected sack containing rotten sprout (9)
I believe the answer is:
gastropub
'decent restaurant' is the definition.
'gastropub' can be an answer for 'restaurant' (I've seen this before). I am not sure about the 'decent' bit.
'rejected sack containing rotten sprout' is the wordplay.
'rejected' is a reversal indicator.
'sack' becomes 'bag' (I've seen this before**).
'containing' is an insertion indicator.
'rotten' is an anagram indicator.
'bag' reversed gives 'gab'.
'sprout' anagrammed gives 'stropu'.
'gab' enclosing 'stropu' is 'GASTROPUB'.
Can you help me to learn more?
(Other definitions for gastropub that I've seen before include "Place to eat" , "Bogus trap (anag) -- somewhere good to eat and drink?" , "place of fine dining" , "Local with good food" , "Eaterie" .)