Five yoga exercises on European cruise (6)
I believe the answer is:
voyage
'cruise' is the definition.
(a cruise is a sea voyage)
'five yoga exercises on european' is the wordplay.
'five' becomes 'V' (Roman numeral).
'exercises' indicates an anagram (I've seen 'exercising' mean this).
'on' means one lot of letters goes inside another (as in clothing 'on' a person).
'european' becomes 'E' (abbreviation e.g. EU).
'yoga' is an anagram of 'oyag'.
'v' placed into 'oyag' is 'voyag'.
'voyag'+'e'='VOYAGE'
(Other definitions for voyage that I've seen before include "tour" , "Ocean trip" , "Long journey by sea or air" , "See 7" , "Travel by water" .)