Family in Copenhagen on vacation touring city (4)
I believe the answer is:
clan
'family' is the definition.
(I've seen this before)
'copenhagen on vacation touring city' is the wordplay.
'on vacation' says to hollow out the word (remove centre letters).
'touring' indicates putting letters inside (touring can mean going round).
'city' becomes 'la' (Los Angeles).
'copenhagen' with its centre taken out is 'cn'.
'cn' going around 'la' is 'CLAN'.
'in' acts as a link.
(Other definitions for clan that I've seen before include "Kinship group" , "Scottish tribe" , "Group with a tartan?" , "Macdonald, perhaps" , "Kin group" .)