Write one's name as indication (4)
I believe the answer is:
sign
This could be a double definition.
'write one's name' is the first definition.
'sign' can be an answer for 'write' (signing is a kind of writing). I am not certain of the 'one's name' bit.
'indication' is the second definition.
(I know that indication can be written as sign)
'as' is the link.
Can you help me to learn more?
(Other definitions for sign that I've seen before include "Ram" , "add name" , "Public notice; portent" , "Communicate to the deaf" , "Manifestation" .)