Possible Clues:

• 'The nipper gets there - just (2,1,5)'
• If absolutely necessary, holding a non-violent strike in check
• A measure to restrict strike if absolutely necessary
• If necessary, move slowly with a light touch intially
• Paint to be treated in a church? If need be
• Only if it's really necessary
• Answer: draw off small measure, if necessary
• Where salt may be taken, if necessary?
• Knock through loose chain if necessary
• A regular fixture in the pub - a small measure but only if absolutely necessary!