Being indecisive, I'm going to holiday houses (11)
I believe the answer is:
vacillation
'being indecisive i'm going to holiday houses' is the definition.
I can't tell whether this definition defines the answer.
'i'm going to holiday houses' is the wordplay.
'i'm going to' becomes 'I'll' ('I'm going to' can mean 'I will' or 'I'll').
'holiday' becomes 'vacation' (synonyms).
'houses' indicates putting letters inside.
'ill' going into 'vacation' is 'VACILLATION'.
Can you help me to learn more?
(Another definition for vacillation that I've seen is " Indecision; wavering".)