John, one wanting office outside, maybe spent to much? (8)
I believe the answer is:
lavished
'spent to much?' is the definition.
I can't tell whether this definition defines the answer.
'john one wanting office outside maybe' is the wordplay.
'john' becomes 'lav' (both can mean a toilet).
'one wanting office' becomes 'shed' (I can't justify this - if you can you should give a lot more credence to this answer).
'outside' indicates putting letters inside.
'maybe' becomes 'i' (I've seen this in other clues).
'lav'+'shed'='lavshed'
'lavshed' placed around 'i' is 'LAVISHED'.
Can you help me to learn more?
(Another definition for lavished that I've seen is " wasted".)