'ard up. With support finally overcomes disadvantages (9)

I haven't cracked this one yet — but the brilliant team at Fifteensquared have:

‘ARD reversed (up, in a down clue) + W (abbreviation for with) + BACK (support, as a verb = give one’s approval to) + final letter of [overcome] S . It’s very unusual to see a full stop in a cryptic clue, which is normally a single sentence or sentence fragment; I’d expect a semicolon or dash instead.