The Telegraph Toughie puzzle clues 2019 Dec 20

• Activity and feature of adders? They make calculations Crossword Clue
• Amount of weight seaman's carrying variable Crossword Clue
• Approved of Kelvin disrupting party revolutionary Crossword Clue
• Attendant with historical records (five lost) for certain governments Crossword Clue
• Bearing first of children with Mike out of wedlock Crossword Clue
• Bird's training collie latterly to pen sheep Crossword Clue
• Crystalline rock in wagon procured by pick Crossword Clue
• Doc with meter reviewed layer of embryo Crossword Clue
• Electronic playing facility rock 'n' roller built Crossword Clue
• Engraves swallows in elaborate scene Crossword Clue
• Entrepreneur on break working out, as part of a five-a-day regime? Crossword Clue
• European pair extremely joyous drinking vermouth and lemon -- more than one Crossword Clue
• Feeling mushy peas around cold room above Iceland, say Crossword Clue
• Former carriage, interior not given public appearance Crossword Clue
• Gaelic woman's delight regularly apparent when receiving hat Crossword Clue
• Is the new crossing good for boats? Crossword Clue
• Junk on sale by river irks posh types Crossword Clue
• Killer in Worcs borders hiding Crossword Clue
• Margaret misses initial lodging because that's warmer at breakfast-time? Crossword Clue
• Match during competition that is a favourite? Crossword Clue
• Middle of emmental portion served up to catch vermin? Crossword Clue
• Obscure old film on teeth student ignored Crossword Clue
• One moving overseas record company erected work unit Crossword Clue
• Opening with Ron's car key again Crossword Clue
• Perhaps pond-life seem to incite pub brouhaha, all ending in casualty Crossword Clue
• Period clothes mostly embroidered, dressing two separately Crossword Clue
• Protective preparation made by civil engineer guarding home when on holiday Crossword Clue