Tight component in maladjusted gyroscope (4)
I believe the answer is:
edgy
'tight' is the definition.
(both can mean anxious or nervous)
'component in maladjusted gyroscope' is the wordplay.
'component in' says the answer is hidden in the clue.
'EDGY' is hidden in the letters of 'maladjusted gyroscope'.
(Other definitions for edgy that I've seen before include "Extremely" , "Anxious" , "Uneasy" , "Red shade" , "ready to flap?" .)