Item that fixes part of cooker having new trouble (7)
I believe the answer is:
hobnail
'item that fixes part' is the definition.
The definition and answer can be both man-made objects as well as being singular nouns.
Maybe you can see a link between them that I can't see?
'cooker having new trouble' is the wordplay.
'cooker' becomes 'hob' (part of a stove).
'having' means one lot of letters go next to another.
'new' becomes 'n' (common abbreviation eg NT for New Testament).
'trouble' becomes 'ail' (synonyms).
'hob'+'n'+'ail'='HOBNAIL'
'of' is the link.
Can you help me to learn more?
(Other definitions for hobnail that I've seen before include "One keeping shoes on" , "Walk over roughly" , "Stud for boots" , "Stud on boot" , "Protection for the sole of a heavy boot" .)