Ifs and buts (7)
(Other definitions for conjunctions that I've seen before include "Astronomical alignments" , "They may link sentences" , "Words like "and" and "but"" , "Link words such as 'and', 'but'" .)
(Other definitions for caveats that I've seen before include "Cautions, reservations" , "Vacates (anag.)" , "Warnings" .)