It's sat on excessively in the outskirts of Solihull (5)
I believe the answer is:
stool
'it's sat' is the definition.
I can't tell whether this definition defines the answer.
'excessively in the outskirts of solihull' is the wordplay.
'excessively' becomes 'too' (to too great a degree).
'in the' means one lot of letters goes inside another.
'outskirts of' says to hollow out the word (remove centre letters) (only letters on the outskirts).
'solihull' with its middle removed is 'sl'.
'too' going into 'sl' is 'STOOL'.
'on' acts as a link.
Can you help me to learn more?
(Other definitions for stool that I've seen before include "Small seat" , "item of furniture here" , "Simple seat" , "Backless chair" , "place butt on one?" .)