Nice Travels With My Aunt to open at flicks (6)
I believe the answer is:
cinema
'flicks' is the definition.
(I've seen this before)
'nice travels with my aunt to open' is the wordplay.
'travels with' indicates anagramming the letters.
'to open' indicates taking the first letters (I've seen 'opens' mean this).
The first letters of 'my aunt' is 'ma'.
'nice' with its letters anagrammed with 'ma' gives 'CINEMA'.
'at' is the link.
(Other definitions for cinema that I've seen before include "Iceman (anag)" , "Place of entertainment" , "Screening" , "Picture house" , "Films, collectively" .)