2624: Him and her

Each Across unclued light is associated in the same way with a Down one (one of two words).

        Across

   1    In small conurbations, transport deficiencies (10)

   7    Walk from Piraeus to Athens (4)

15    Huge resistance from masculine self-importance? I wonder (6)

18    PM’s residence about to receive first of rock stars (5)

19    Correct uncle, and head’s bitten off (5)

25    Cheers afternoon, taking in TV hospital show (7)

26    Excellent on Polish and Persian verse (5)

27    A line gets out of position rapidly (5)

29    Dull, like a little lake? (7)

32    Catch simpler-sounding shapes (8)

34    Final words in row more rubbishy (7)

38    Gang steals...