Fixes stress, phonetically (5)
I believe the answer is:
tacks
'fixes' is the definition.
(tacking is a kind of fixing)
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for tacks that I've seen before include "Approaches" , "They fix" , "Shorts nails with big heads" , "Short nails" , "Fixes" .)