Turned on, tense and worried? Write music (6)
I believe the answer is:
notate
'write music' is the definition.
(I've seen this in another clue)
'turned on tense and worried?' is the wordplay.
'turned' is a reversal indicator.
'tense' becomes 't' (grammatical abbreviation).
'and' is a charade indicator (letters next to each other).
'worried?' becomes 'ate' (something worrying may eat someone up).
'on' in reverse letter order is 'no'.
'no'+'t'+'ate'='NOTATE'
(Other definitions for notate that I've seen before include "Put down in writing" , "Mark up" , "Express in symbols" , "Set down (in symbols)" , "Write special signs" .)