Embargo on articles - fruit? (6)
I believe the answer is:
banana
'fruit?' is the definition.
(type of fruit)
'embargo on articles' is the wordplay.
'embargo' becomes 'ban' (a ban on trade).
'on' means one lot of letters go next to another (in a down clue, letters appear on others).
'articles' becomes 'ana' ('an' and 'a', English indefinite articles).
'ban'+'ana'='BANANA'
(Other definitions for banana that I've seen before include "Fruit led by prohibition" , "Plantain-like fruit" , "Fruit that comes in a bunch" , "Curved fruit (in a split dessert?)" , "Fruit with soft, sweet flesh" .)