Still got a few gaps.
25d Conversion of two cardinals, habit-clad (5)
t?a?s?t
'Transit' fits but can't see why.
43d Old-fashioned cycle is all that's produced (3-4)
Might be 'out-turn' but that would fit a definition of 'is what's produced' rather than 'is all that's produced.
45a Impulsive Shakespearean spiced up secondary line (7)
Might be 'Hotspur' but I don't understand the parsing.