Change the subject of tourist's bad review? (4,2,5)

'tourist's bad review?' is the definition.
I know nothing about this answer so I cannot judge whether it can be defined by this definition.

'change the subject of' is the wordplay.
I cannot quite understand how this works, but
'change' could be 'go' (going is a kind of changing) and 'go' is found within the answer.
'the' could be 't' (the is pronounced as a 't' sound in some dialects) and 't' is present in the answer.
'of' could be 'o' and 'o' is present in the answer.
This explanation may well be incorrect...

Can you help me to learn more?