An indication gins were mixed (4)
I believe the answer is:
sign
'an indication' is the definition.
(I know that indication can be written as sign)
'gins were mixed' is the wordplay.
'gins' can be anagrammed to 'SIGN'.
But, I am not sure how the anagram is indicated.
Can you help me to learn more?
(Other definitions for sign that I've seen before include "add name" , "Communicate to the deaf" , "Show" , "Leo, for instance" , "Traffic control - to write one's name" .)