Hi Tammyfinn and Dutchy,
Tammyfinn, I have the same answers as Dutchy for those clues.
30D. Remedies = Antidotes
'setback' means 'set' back (reverse) = 'tes' after 'I do'
social worker = ant
'ant' + 'I do' + 'tes' = antidotes
40A. Christmas treats = Mince Pies
thousand = 'M' in roman numerals
'm' + 'in' +'pieces' is an anagram of 'mince pies'
24D. Protective cover = Cocoon
company = co
one company after another = coco
'coco' takes 'on' = cocoon
Post again if you need help. Good luck in the competition!
Hope to talk to you again soon.
Regards, Butterfly