Give to the new-formed party therein (5)
I believe the answer is:
endow
'give' is the definition.
(I've seen this before)
'the new-formed party therein' is the wordplay.
I cannot really understand how this works, but
'new' could be 'n' and 'n' is located in the answer.
'party' could be 'do' (do is a kind of party) and 'do' is found within the answer.
This may be the basis of clue (or it may be nonsense).
'to' is the link.
Can you help me to learn more?
(Other definitions for endow that I've seen before include "Provide (with financial support, qualities etc)" , "Settle an income or property on" , "Provide capital to ensure an income for an institution" , "Woden (anag.)" , "Bequeath estate to" .)