Tension-filled fear outwardly over anything (7)
I believe the answer is:
fraught
'tension-filled' is the definition.
(I've seen this before)
'fear outwardly over anything' is the wordplay.
'outwardly' suggests removing the centre (only the outermost letters are used).
'over' means one lot of letters go next to another (in a down clue, some letters go over others).
'anything' becomes 'aught' ('aught' means anything).
'fear' with its middle removed is 'fr'.
'fr'+'aught'='FRAUGHT'
(Other definitions for fraught that I've seen before include "Emotionally charged" , "Tension-filled" , "Causing stress" , "Burdened with anxiety" , "great anxiety" .)