Tablet yours truly had to swallow every year (4)
I believe the answer is:
ipad
'tablet' is the definition.
(tablet made by Apple)
'yours truly had to swallow every year' is the wordplay.
'yours truly had' becomes 'I'd' ('I had', referring to the crossword setter).
'to swallow' is an insertion indicator.
'every year' becomes 'pa' (per annum).
'id' enclosing 'pa' is 'IPAD'.
(Other definitions for ipad that I've seen before include "Tablet computer from Apple" , "Small personal computer" .)