Eye part of Dublin, maybe avoiding hotel (4)
I believe the answer is:
iris
'eye part' is the definition.
(iris is a part of the eye)
'of dublin maybe avoiding hotel' is the wordplay.
'of dublin maybe' becomes 'Irish' (Dublin is the capital of Ireland).
'avoiding' is a deletion indicator.
'hotel' becomes 'h' (phonetic alphabet: alpha, bravo, charlie etc.).
'irish' with 'h' taken out is 'IRIS'.
(Other definitions for iris that I've seen before include "Coloured part of the lamp" , "Lily" , "Plant - part of the eye" , "Flower - girl's name" , "Murdoch in writing" .)