1) CCCXXV doubled 2) CCCXXV x II 3) Half of MCCC 4) MCCC halved 5) Mid seventh-century year 6) Mid-seventh century date 7) Multiple of XXV and XXVI 8) Roman 650 9) Seventh-century date 10) Seventh-century year 11) XIII x L 12) XXV times XXV plus XXV 13) XXV x XXVI Found on https://www.crosswordclues.com/clue/dcl
The Distillers Company Ltd. Originally formed out of a trade agreement made between six Lowland Grain distillers in 1857. Found on http://www.encyclo.co.uk/local/21451
Data Control Language + Declaration + DEC Command Language [DEC] + Device Clear + Digital Control Logic + Digital Command Language [Digital]
Found on http://www.encyclo.co.uk/visitor-contributions.php