An infiltrating gentile set out without grace (9)
I believe the answer is:
inelegant
'out without grace' is the definition.
I can't judge whether this definition defines the answer.
'an infiltrating gentile set' is the wordplay.
'infiltrating' is an insertion indicator.
'set' indicates an anagram (instruction to set the letters).
'gentile' anagrammed gives 'inelegt'.
'an' put inside 'inelegt' is 'INELEGANT'.
Can you help me to learn more?
(Other definitions for inelegant that I've seen before include "not the herb of grace?" , "ungainly" , "Unpolished" , "Eglantine (anag)" , "Ungraceful" .)