Obvious creatures around lake (7)
I believe the answer is:
blatant
'obvious' is the definition.
(I've seen this before)
I don't understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for blatant that I've seen before include "Unashamedly open" , "Open; flagrant" , "Open, unashamed" , "Overt and shameless" , "Barefaced" .)