Can anyone help with 22across: Fruit gives energy and zip when eaten (5) PE_OS
I assume the answer is PEPOS but don't know why, except that pep is energy, please can someone enlighten me?
The rest of the grid is filled, but though I've searched I can't find any nine letter word that would have the 'thematic' removal at the front, again could someone point me in the right direction!
Thanks in advance.