Unhappy DIY’s made complicated (8)
I believe the answer is:
dismayed
'unhappy' is the definition.
(dismayed means unsettled or unhappy)
'diy's made complicated' is the wordplay.
'complicated' indicates an anagram (a complex or confusing ordering of the letters).
'diys'+'made'='diysmade'
'diysmade' anagrammed gives 'DISMAYED'.
(Other definitions for dismayed that I've seen before include "Alarmed, discouraged" , "Daunted" , "Downhearted" , "Horrified" , "Dispirited" .)