Obvious I have flipping depression (7)
I believe the answer is:
evident
'obvious' is the definition.
(similar in meaning)
'i have flipping depression' is the wordplay.
'i have' becomes 'I've' (contraction of 'I have').
'flipping' shows that the letters should be reversed in order.
'depression' becomes 'dent' (synonyms).
'ive' written backwards gives 'evi'.
'evi'+'dent'='EVIDENT'
(Other definitions for evident that I've seen before include "Indisputable" , "Quite obvious and clear" , "'Plain, apparent (7)'" , "Clearly discernible" , "Obvious, quite apparent" .)