Loudly express desire to tour round in the buff (9)
I believe the answer is:
yellowish
'the buff' is the definition.
(I've seen this before)
'loudly express desire to tour round' is the wordplay.
'loudly' becomes 'yell' (I can't explain this - if you can you should give a lot more credence to this answer).
'express desire' becomes 'wish' (I've seen this before).
'to tour' is an insertion indicator (to tour can mean to go around).
'round' becomes 'o' (round can mean a round object).
'yell'+'wish'='yellwish'
'yellwish' going around 'o' is 'YELLOWISH'.
'in' is the link.
Can you help me to learn more?
(Other definitions for yellowish that I've seen before include "A little off-colour" , "Similar to the colour of an egg yolk" , "somewhat lacking in courage?" , "with a bit of lemon" , "Buff" .)