Jiffy found with body fluid in caravan? (6,4)
I believe the answer is:
mobile home
'caravan?' is the definition.
(caravan is a kind of mobile home)
'jiffy found with body fluid in' is the wordplay.
'jiffy' becomes 'mo' (both can mean a very short period of time).
'found with' means one lot of letters go next to another.
'body fluid' becomes 'bile' (bile is a kind of body fluid).
'in' becomes 'home' ('he's in' can mean 'he's home').
'mo'+'bile'+'home'='MOBILE HOME'
(Other definitions for mobile home that I've seen before include "Permanently-used caravan" , "House on wheels?" , "Large caravan for permanent residence" , "Caravan maybe" .)