Help appreciated filling in the gaps with these......
33a Golfer with new competition capable of making great strides (5-6) - SEVEN LEAGUE (Boots for 'Great strides')
38a Sovereign found by girl so far from grave (8) - JOKINGLY
Is it 'Girl' = JO + 'Sovereign' = KINGLY?
33d Know-all writing up pretentious nonsense (11) - SMARTYPANTS
I assume 'Nonsense' = PANTS, but I don't get the 'Writing up' part.
46d In the afternoon, when returning, heat plant (7) - SAMPIRE (Plant)
I can see AM for 'Afternoon' but not the rest.