Sack used by recluse sometimes, to carry bread rolls (6)
I believe the answer is:
bagels
'bread rolls' is the definition.
'sack used by recluse sometimes' is the wordplay.
'sack' becomes 'bag' (I've seen this in another clue).
'used by' says to put letters next to each other.
'sometimes' means one should take alternating letters (some of the letters are taken at regular intervals).
The alternate letters of 'recluse' are 'els'.
'bag'+'els'='BAGELS'
'to carry' is the link.
This may not be right. Some or all of it may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for bagels that I've seen before include "Doughnut-shaped roll with hard crust" , "Hard ring-shaped rolls" , "Doughnut-shaped bread rolls" , "Ring-shaped bread rolls" , "Jewish bread rolls" .)