Completely or partly swallowed (3)
I believe the answer is:
all
'completely' is the definition.
(I know that completely can be written as all)
'partly swallowed' is the wordplay.
'partly' indicates a hidden word (part of the clue is used).
'ALL' can be found hidden inside 'swallowed'.
'or' acts as a link.
(Other definitions for all that I've seen before include "Completely, everything" , "Total" , "Every single one" , "The whole quantity" , "and 16 Across and 23 Across: Even so" .)