Hatch up plan to go round zone, one leaving with great confidence (8)
I believe the answer is:
chutzpah
'great confidence' is the definition.
'hatch up plan to go round zone one leaving' is the wordplay.
'plan' indicates anagramming the letters (plan can mean organise).
'to go round' means one lot of letters goes inside another.
'leaving' indicates named letters should be taken away.
'zone' with 'one' taken away is 'z'.
'hatch'+'up'='hatchup'
'hatchup' is an anagram of 'chutpah'.
'chutpah' going around 'z' is 'CHUTZPAH'.
'with' is the link.
(Other definitions for chutzpah that I've seen before include "Unbelievable audacity (from Yiddish)" , "Impertinence" , "front" , "Extreme audacity" , "Slang for shameless cheek or impudence" .)