Some American gel I candied for decoration (8)
I believe the answer is:
angelica
'for decoration' is the definition.
(I've seen this before)
'some american gel i candied' is the wordplay.
'some' indicates the answer is hidden within the clue (some of the parts of the word are used).
'ANGELICA' can be found hidden inside 'american gel i candied'.
(Other definitions for angelica that I've seen before include "Girl" , "may be sitting on top of the trifle" , "Aromatic plant" , "What's good for decorating cakes" , "Candied stalks used for cake decoration" .)