Observer Everyman Please Parse

[Gavmacp]

A little better this week but more importantly quite enjoyed.
These are the across answers I don't quite get....
1a. Bankrupt regretted embracing hollow illusion (6) Ruined
11a. Captured period, retaining look in old-fashioned cinema (11) Nickelodeon
14a. Run into great area of land (4) A?R? Thinking acre
20a. Betray twenty in style of ancient Rome? (6-5) Double cross
24a. Proper uncertainty reflected in gambling (9) Befitting

[Lie-in King]

Ruined - 'i(llusio)n' (hollow, in) 'rued' (regretted)
Nickelodeon - 'lo(ok)' (in) 'nicked + eon'
Acre - 'r(un)' (in) 'ace' (great)
Double-cross - 'XX' - 20, Roman numerals
Befitting - 'if' (uncertainty, reflected; back, in) 'betting'

[scorpiojo]

Ru i(llusio)n ed
Nicke Lo d eon(period)
Ace - great + R
20 = XX
Betting + if (uncertainty) reversed

[bibblebub]

1a: regretted = RUED, hollow illusion = I(llusio)N
RU in ED

11d: captured = NICKED, period = EON, look = LO
NICKE lo D EON

[Gavmacp]

Thank you! Would be lost without your (and others) help!

[dannyk13]

1a.i(llusio)n inside rued(regretted)
11a,lo(look) inside nicked(captured) + eon (period)
14a.r(run)inside ace(great)
20a. double x Roman twenty
24a if(uncertainty) reversed inside betting(gambling)