Is he after grabbing that bundle? (5)
I believe the answer is:
sheaf
'that bundle?' is the definition.
('sheaf' can be a synonym of 'bundle')
'is he after grabbing' is the wordplay.
'grabbing' says the answer is hidden in the clue (the answer is held or grabbed by the clue).
'SHEAF' can be found hidden inside 'is he after'.
(Other definitions for sheaf that I've seen before include "set of papers" , "Bundle as of arrows or corn stalks" , "Bundle, as of reeds for thatching" , "Reaper's bundle" , "Collection of papers" .)