Packed with celebs, large and small, visiting place of sacrifice (3-4)
I believe the answer is:
all-star
'packed with celebs' is the definition.
I can't judge whether this defines the answer.
'large and small visiting place of sacrifice' is the wordplay.
'large' becomes 'L' (eg in clothes sizes).
'and' says to put letters next to each other.
'small' becomes 's' (abbreviation - e.g. clothes size).
'visiting' indicates putting letters inside.
'place of sacrifice' becomes 'altar' (I've seen this in another clue).
'l'+'s'='ls'
'ls' put within 'altar' is 'ALL-STAR'.
Can you help me to learn more?
(Other definitions for all-star that I've seen before include "Composed wholly of top performers" , "Entirely comprised of top players/actors" , "Made up of outstanding performers only" , "Comprising only top performers" , "Having a well-known cast" .)