Fairy left in jeopardy (5)
I believe the answer is:
peril
'jeopardy' is the definition.
(synonyms)
'fairy left' is the wordplay.
'fairy' becomes 'peri' (Persian mythological being).
'left' becomes 'l' (common abbreviation).
'peri'+'l'='PERIL'
'in' is the link.
(Other definitions for peril that I've seen before include "Danger, hazard" , "risk" , "Hazardous situation" , "Danger of serious kind" , "Source of danger" .)