Undertake new parts as a means of carrying (8,5)
I believe the answer is:
shoulder strap
'a means of carrying' is the definition.
I can't judge whether this definition defines the answer.
'undertake new parts' is the wordplay.
'undertake' becomes 'shoulder' (I've seen this before).
'new' indicates anagramming the letters.
'parts' with letters rearranged gives 'strap'.
'shoulder'+'strap'='SHOULDER-STRAP'
'as' is the link.
Can you help me to learn more?
(Other definitions for shoulder strap that I've seen before include "One supporting slip" , "A supporter" .)