She performed poorly, but we should 'make some allowance for' her inexperience. = Some 'allowance should be made for' her inexperience. [=because she is inexperienced, we should not blame her too much for performing poorly]
When we bought our new car we got a trade-in 'allowance' of $2,000 on our old car. [=the price of our new car was reduced by $2,000 because we traded in our old car]
When you're comparing costs from different decades, you need to 'make allowance for' inflation. [=you need to allow for inflation]
(..) Yeah! They're cool, and they last the rest of your life. you will not be getting a tattoo for Christmas. Yeah. If you want one, you'll have to pay for it out of your allowance. - All right! - Homer! - "Yello." - Marge, please. - Who's this? (..)1989 TvShow: The Simpsons Title: Simpsons Roasting on an Open Fire Season: 1 Episode 1