Day out in nude provoked dissatisfaction (5)
I believe the answer is:
ennui
'dissatisfaction' is the definition.
(I know that ennui is a type of dissatisfaction)
'day out in nude provoked' is the wordplay.
'day' becomes 'd' (abbreviation for day).
'out' indicates named letters should be taken away.
'provoked' indicates anagramming the letters.
'in'+'nude'='innude'
'innude' with 'd' taken away is 'innue'.
'innue' with letters rearranged gives 'ENNUI'.
(Other definitions for ennui that I've seen before include "Mental weariness" , "having nothing to do" , "boring" , "Feeling of dissatisfaction" , "Sense of tedium" .)