Inexperience contributing to calamity out here (5)
I believe the answer is:
youth
'inexperience' is the definition.
(I've seen this before)
'contributing to calamity out here' is the wordplay.
'contributing to' indicates a hidden word.
'YOUTH' can be found hidden inside 'calamity out here'.
(Other definitions for youth that I've seen before include "Salad days" , "Young person" , "Teenager" , "Young man" , "Youngsters" .)