5a Held back spread balls (6)
This could be an anagram of "spread" i.e. spared, but I cannot parse it. Please let me know if this is correct.
25a One gets out of supporting hostile reformer (11)
Progressive seems to fit, but I am not sure. I have P???R???I?E.
20d Dolly's bust: it has a number of names (6)
I have L???D? Lloyds seems to fit but I can't parse it.
26d Sun very eager initially to finish off Cyclops? (5)
I have (possibly) S?L??
I think Cyclops, the compiler, means I or me, but I am not sure.
No idea about this. Please can you help? Possibly "solve" using initials SVE.