Nervously tense or angry (7)
I believe the answer is:
uptight
This clue is a double definition.
'nervously tense' is the first definition.
(I've seen this before)
'angry' is the second definition.
(thesaurus)
(Other definitions for uptight that I've seen before include "Tense or angry" , "edgy" , "Nervous, tense, anxious" , "Tensely repressed" , "Tip thug, being nervously tense" .)