I have brought up depression, to be clear (7)
I believe the answer is:
evident
'be clear' is the definition.
(synonyms)
'i have brought up depression' is the wordplay.
'i have' becomes 'I've' (contraction of 'I have').
'brought up' says the letters should be written in reverse (in a down clue, letters go up).
'depression' becomes 'dent' (dent is a kind of depression).
'ive' backwards is 'evi'.
'evi'+'dent'='EVIDENT'
'to' is the link.
(Other definitions for evident that I've seen before include "Quite obvious, manifest" , "Quite obvious, easy to see" , "'Plain, apparent (7)'" , "Obvious, may be plainly seen" , "Patent" .)