Instrument without charge, no good getting upset (5)
I believe the answer is:
sitar
'instrument' is the definition.
(sitar is a kind of instrument)
'without charge no good getting upset' is the wordplay.
'without charge' becomes 'gratis' (I've seen this before).
'no' suggests deleting specific letters.
'good' becomes 'g' (abbreviation).
'getting upset' says the letters should be written backwards.
'gratis' with 'g' removed is 'ratis'.
'ratis' written backwards gives 'SITAR'.
(Other definitions for sitar that I've seen before include "Plucked instrument" , "Indian string instrument" , "Hindu stringed instrument" , "Long-necked musical instrument of India" , "Long necked and often plucked" .)