Possible Clues:

• Language of the shingle?
• The shin with the leg is over the sea
• Get across the sea for them, in a manner of speaking
• Rose may be single, desperately seeking husband
• Pool accessory?
• The nationality is found in shingle
• Might this be his glen, in a manner of speaking?
• Single change to hard speech
• Spin put on a ball
• His age combined with idleness caused under-production