Electrical item used in garret pad Amazon sent round (7)
I believe the answer is:
adapter
'electrical item' is the definition.
(type of electrical item)
'in garret pad amazon sent round' is the wordplay.
'in' indicates the answer is hidden within the clue.
'sent round' says the letters should be written in reverse.
'retpada' is hidden within 'garret pad amazon'.
'retpada' written backwards gives 'ADAPTER'.
'used' is the link.
(Other definitions for adapter that I've seen before include "Plug attachment" , "sort of plug" , "'Apt, dear!' (anag.); a switching device" , "Plug device" , "I could modify" .)