13a) Ravi half-heartedly cheers Indian food (5)
R-I-A
11d) Ogle Virginia, perhaps from below (4)
-E-R
Must be "LEER", but I can't see why. Something to do with tobacco?...
20d) Mother dear holds precedence (7)
P-I-A-Y
Must be PRIMARY, but I can't see it from the clue.
MARY = mother?
2d) Price going up? (3,4)
A-R/-A-E
air something??...
4a) About rent in arrears, perhaps to one's ears, a type of clue that's somewhat new (8)
-L-R-H-W
Must be CLERIHEW?
I thought that was a comic poem about a famous person......