Hungry new entries will accept uniform (8)
I believe the answer is:
esurient
'hungry' is the definition.
(similar in meaning)
'new entries will accept uniform' is the wordplay.
'new' is an anagram indicator.
'will accept' indicates putting letters inside.
'uniform' becomes 'U' (phonetic alphabet: alpha, bravo, charlie etc.).
'entries' is an anagram of 'esrient'.
'esrient' enclosing 'u' is 'ESURIENT'.
(Other definitions for esurient that I've seen before include "Hungry, greedy" , "could eat a horse" , "Greedy; ensure it (anag.)" , "Hungry; retinues (anag.)" , "Rapacious" .)