Produced personally, according to the manual (8)
I believe the answer is:
handmade
'manual' is the definition.
Both the definition and answer are adjectives. Perhaps there's a link between them I don't understand?
'produced personally according to' is the wordplay.
I cannot quite see how this works, but
'produced' could be 'made' ('make' can be a synonym of 'produce') and 'made' is found within the answer.
The remaining letters 'hand' is a valid word which might be clued in a way I don't understand.
This explanation may well be incorrect...
'the' acts as a link.
Can you help me to learn more?
(Other definitions for handmade that I've seen before include "Not generated by machine" , "no machine involved" , "product of a real craftsman" , "It could describe antique" , "Produced with craftsmanship" .)