Somehow nerd met with one's approval (11)
I believe the answer is:
endorsement
'approval' is the definition.
(I know that endorsement is a type of approval)
'somehow nerd met with one's' is the wordplay.
'somehow' indicates anagramming the letters.
'with' says to put letters next to each other.
'nerd'+'met'='nerdmet'
'nerdmet' put after 'ones' is 'onesnerdmet'.
'onesnerdmet' is an anagram of 'ENDORSEMENT'.
(Other definitions for endorsement that I've seen before include "passing through red light may carry it" , "Official backing" , "Support and approval" , "Sanction, backing" , "Approval - modern teens (anag)" .)