Possible Clues:

• Severe self-disciplinarian
• Hermit
• A quote comes back about self-catering -- one abstains
• Practising severe self-discipline
• Severe figure when with football team league's dropped
• One who practises extreme self-discipline
• Austere type left out of a second eleven based in Glasgow
• One avoiding indulgence in case it spoilt chapter
• Area on south side of Scotland withholding pound? That could be severe
• So-called 'laboratory's first gift to the loom'