Hi Roof,
It is a difficult one but I recommend sticking with it:-)
2d - 4 letter "spanner" as in 'something that spans' then single letter "note" + single letter "current" + 4 letter "workplace" - definition is "see manager" (think 'holy')
5d - 6 letter "old fashioned" then 4 letter "part of word" - definition is "may be extracted by solvers"
14d - 3 letter "not just any" + single letter "old" + 6 letter "revolt" - definition is "seeking explanation for".
20a - First 9 letters are "loose-limbed men" split 6, 3 then a 7 letter "later" minus its middle letter/losing heart - definition is "extra medicine is taken"