Charlie with new socks inside selected (6)
I believe the answer is:
chosen
'selected' is the definition.
(similar in meaning)
'charlie with new socks inside' is the wordplay.
'charlie' becomes 'c' (phonetic alphabet: alpha, bravo, charlie etc.).
'with' means one lot of letters go next to another.
'new' becomes 'n' (common abbreviation eg NT for New Testament).
'socks' becomes 'hose' (I've seen this in other clues).
'inside' is an insertion indicator.
'c'+'n'='cn'
'cn' enclosing 'hose' is 'CHOSEN'.
(Other definitions for chosen that I've seen before include "'''Many are called, but few are ...'' (Bible) (6)'" , "Elected, picked" , "part of Asia once" , "Selected, preferred" , "Selected - Japanese name for Korea" .)