So uplifting, tucking into cold chicken selected (6)
I believe the answer is:
chosen
'selected' is the definition.
('chosen' can be similar in meaning to 'selected')
'so uplifting tucking into cold chicken' is the wordplay.
'uplifting' says the letters should be written in reverse.
'tucking into' indicates putting letters inside.
'cold' becomes 'c' (eg on taps).
'chicken' becomes 'hen' (hen is a kind of chicken).
'so' written backwards gives 'os'.
'c'+'hen'='chen'
'os' put inside 'chen' is 'CHOSEN'.
(Other definitions for chosen that I've seen before include "'''Many are called, but few are ...'' (Bible) (6)'" , "Selected - Japanese name for Korea" , "If you're one of these few, you're very privileged" , "Selected, preferred" , "Select" .)