Come round with a spare part to match (7)
I believe the answer is:
compare
'match' is the definition.
(thesaurus)
'come round with a spare part' is the wordplay.
'round' indicates putting letters inside.
'with' means one lot of letters goes inside another.
'spare part' becomes 'pr' (I am not sure about this - if you are sure you should believe this answer much more).
'a' going into 'pr' is 'par'.
'come' placed around 'par' is 'COMPARE'.
'to' acts as a link.
Can you help me to learn more?
(Other definitions for compare that I've seen before include "what discriminators do" , "Represent as similar; sounds like emcee" , "Look at differences and similarities between (things)" , "Contrast - liken" .)