The unclued lights are of a kind and are entered in the grid in a thematically appropriate manner.
Across
11 Alpine mineral popular in pasta (7)
12 On the radio, transmit pitch at sea (5)
14 Mostly irrational, a section of holy book (4)
17 Yam in dough, recipe also from east (9)
20 Senorita paid to dance, taking breath away audibly (12)
22 Performed holding instrument that’s weakened (7)
24 Inactive state, with no middle? (4)
26 I don’t know ‘Fathers and Sons’ (4)
29...

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