State of perfect happiness (7)
I believe the answer is:
nirvana
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">state of perfect happiness</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for nirvana that I've seen before include "State of perfect happiness" , "Eastern place of complete bliss" , "Ultimate tranquil state" , "'Transcendent state, the final goal of Buddhism (7)'" , "Iran van (anag) - blissful state!" .)