Stuck on last three... 17a very tiny organism, especially a bacterium (7) -I-R--- (is it micro something?). 24a enlarged cells in which usually eight spores are found (4) -S-I 15d bringing forth young...
7d Guard two rings graduate found in Rolls-Royce (3/3) R-O-A- (must be an anagram of RROOBA or RROOMA but at a loss!) 12d Recall guy with daugthter propping up bar (11) --U-T-R-A-D
Stuck in top right-hand corner. 9a Country singer gets about with woman and son providing backing ----E-. 4d Cut fruit, dried date (6) ---N-D 5d Provided cases of refuse - 500 (8) ---l-n-d
21a Less common word meaning to remove weapons (5) --A-M (dearm??)
16d Former or French spelling for word meaning Inuit (8) -S---M-U (obviously a different way of spelling eskimo)...
16d Former or French spelling for word meaning Inui9t (8) -S---M-U (obviously a different way of spelling eskimo). 21a Less common word meaning to remove weapons (5) --A-M (dearm?)
14a From team on key bus, inessential bad behaviour (6,8) 9d Introductory text about a dance popular with a top dancer (5,9) -----/--l-e-i-a 11a It's thought necessary to reassure a son in gaol (9)...
Stuck on last two...20a Times for new doctors to march in (6,4) ---R-E/-A-S (obviously "something" days). 19d Overfussy schoolmaster perhaps putting boy into huff (6) ---A-T