Found it with the extra info. My answer would be MANGO.plump, named, prawn, align and olive(adding all info is paramount, perhaps adding in, that its the 'win an M & S Voucher competition' so we can find it easier).Good luck.
Which day's paper? What page is it on? We don't all have every paper, but can sometimes view online. I couldn't find one called "add a letter competition" in the one I viewed.