Thanks for trying Tommy but I don't know any foods beginning with 'ruby'. The ONLY two I've come up with are Roquefort and Rocambole - neither of which fit the clue
Thanks Glasman. Only trouble is it is deffo 9 not 4,5 and this quiz setter is really excellent and doesn't make mistakes. Also, sometimes, you have to get the answer to work out the clue!!! More sleepless nights to come!!