This is a jukugo word that uses the on'yomi readings of the kanji. You didn't learn this reading for 示 yet, so here's a mnemonic to help you:
Someone keeps coming up to you making suggestions and dropping hints that you should buy a sheep (し). It happens so much that you finally decide to grab the hint-droppers arm and... oh my gosh, that's a hoof. They're a sheep!
It seems like Messi made a comment hinting at his transfer.