Beard I'd neglected became twisted (7)
I believe the answer is:
braided
'twisted' is the definition.
Both the definition and answer are adjectives. Maybe there's an association between them I don't understand?
'beard i'd neglected' is the wordplay.
'beard i'd' anagrams to 'BRAIDED'.
However, I'm not sure how this is indicated.
'became' acts as a link.
Can you help me to learn more?
(Other definitions for braided that I've seen before include "Arranged in plaits" , "Plaited" , "put hair into plaits" .)