Siren alarmed in part of peer's tank (5)
I believe the answer is:
renal
'part of peer's tank' is the definition.
Although both the answer and definition are adjectives, I cannot understand how they can define each other.
'siren alarmed in' is the wordplay.
'in' says the answer is hidden in the clue.
'RENAL' is hidden in the letters of 'siren alarmed'.
Can you help me to learn more?
(Other definitions for renal that I've seen before include "Concerning the kidneys" , "Concerned with organ" , "Like an organ" , "Referring to organ" , "like kidneys" .)