Worships one cheat going to foreign isles (8)
I believe the answer is:
idolises
'worships' is the definition.
(I've seen this before)
'one cheat going to foreign isles' is the wordplay.
'one' becomes 'i' (Roman numeral).
'cheat' becomes 'do'.
'going to' means one lot of letters go next to another.
'foreign' indicates an anagram (foreign order of the letters).
'isles' anagrammed gives 'lises'.
'i'+'do'+'lises'='IDOLISES'
(Other definitions for idolises that I've seen before include "Worships and adores" , "Hero-worships" , "Greatly reveres" , "Reveres, adores" , "Apotheosises" .)