Having a hard time making a decision, a party in destructive wind (7)
I believe the answer is:
tornado
'destructive wind' is the definition.
(a tornado is a powerful wind)
'having a hard time making a decision a party' is the wordplay.
'having a hard time making a decision' becomes 'torn' (to be torn is to be unable to make a decision).
'party' becomes 'do' (do is a kind of party).
'torn'+'a'+'do'='TORNADO'
'in' acts as a link.
(Other definitions for tornado that I've seen before include "Dreadful blow" , "Type of cyclone" , "It's a big blow" , "Rapidly whirling column of air" , "lot of wind" .)