1: City flat is swamped by sweets, almost (9)
5: Alternative part of course (5)
7: Erin's heir is hardly content (5)
9: Arranger of mere songs put in the shade (4,5)
11: Clean oneself, but in reverse (3)
12: Privy to accessibility (11)
13: Help found in Adelaide. (3)
14: Missed hoax set up to trap Sunday drunk outside saloon entrance (4,5,2)
16: Exchange concealed proprietary knowledge (5,6)
20: It comes to a point everyone heard (3)
21: Upset top duo; I went and confessed (5,2,2,2)
22: Residue has scattered (3)
23: Race cars Dr. Silver steers without trace of effort (9)
25: It's a blessing, comprehending RandB (5)
26: Republican badly ires one on the way up (5)
27: Praised a general capturing returning traitors (9)