7 Down, Become calm and shine a little - that's not hard (6) ?I?M?R
20 Down, Make surprised comment about lake in darkened condition (6) G?O?M?
21 Down, Still fixed on story one's abandoned (6) S?T?L?
25 Down, Bird around piano to become quiet (4) P?P?
26 Down, Decline rise of new routine (4) T?R?
Compiler - PHI
Many Thanks