Embargo article when family reveals potential hazard (6,4)
I believe the answer is:
banana skin
'potential hazard' is the definition.
(I've seen this before)
'embargo article when family' is the wordplay.
'embargo' becomes 'ban' (I've seen this in another clue).
'article' becomes 'an' (indefinite article).
'when' becomes 'as' (eg 'when I walked' means 'as I walked').
'family' becomes 'kin' (synonyms).
'ban'+'an'+'as'+'kin'='BANANA SKIN'
'reveals' is the link.
(Other definitions for banana skin that I've seen before include "something to cause embarrassment" , "Potential source of slip-up" , "Something causing downfall (colloq.)" , "slipper" , "Potential downfall" .)