It's bound to be geographical (5)
I believe the answer is:
atlas
'be geographical' is the definition.
I can't judge whether this defines the answer.
'it's bound to' is the wordplay.
'it' becomes 't' (abbreviation. e.g. in 'tis).
'bound' indicates putting letters inside.
'to' becomes 'alas' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
't' placed inside 'alas' is 'ATLAS'.
Can you help me to learn more?
(Other definitions for atlas that I've seen before include "Set of charts" , "Sky carrier - map book" , "Titan who held up the sky" , "Titan - map book" , "Sky-toting Titan" .)