Possible Clues:

• Do a calculus calculation
• Make this into a whole in the fire there at last
• Fuse molten granite alien's turned over
• Join in -- note pinched by thankless person
• Come together in Spain after goal upset
• English aim with Northern Ireland all over is to unify
• Mingle where the fire may be after endless winter
• Combine harvester finally brought in by a gent with tie askew
• Get it together, treating disorder with drug
• Form into a whole