Truss charged unit for holiday (10)
I believe the answer is:
staycation
'for holiday' is the definition.
(I have seen 'local holiday' mean 'staycation' so perhaps 'holiday' could also mean 'staycation')
'truss charged unit' is the wordplay.
I cannot quite see how this works, but
'charged' could be 'ion' (I've seen this in other clues) and 'ion' is found within the answer.
'unit' could be 'at' (at is a kind of unit) and 'at' is found within the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for staycation that I've seen before include "Holiday at home" , "local holiday" .)