Undisguised and left in bad surroundings (4)
I believe the answer is:
bald
'undisguised' is the definition.
(I've seen this in another clue)
'left in bad surroundings' is the wordplay.
'left' becomes 'al' (I've seen this in other clues).
'in' means one lot of letters goes inside another.
'bad surroundings' becomes 'bd' (I can't justify this - if you can you should give a lot more credence to this answer).
'al' put into 'bd' is 'BALD'.
'and' acts as a link.
Can you help me to learn more?
(Other definitions for bald that I've seen before include "Exposed" , "Follicly challenged?" , "Lacking hair on the head" , "Blunt; hairless" , "Without hair" .)