End up having sleepover away from home (3,3)
I believe the answer is:
pan out
'end up' is the definition.
(how something pans out is how it ends up)
'sleepover away from home' is the wordplay.
'sleepover' becomes 'pan' ('nap' turned over).
'away from home' becomes 'out' (synonyms).
'pan'+'out'='PAN OUT'
'having' acts as a link.
(Other definitions for pan out that I've seen before include "End up, turn out well" , "Have acceptable result - exclude frying vessel" , "Conclude, end up well" .)