Washout costs Caistor chance to close gap
Bowling first, Caistor made a dream start when Sean Woolley (3 for 51) removed Clawson and Johnny Drabble without scoring to reduce the hosts to 5-2.
It was then 22-3 as Woolley picked up his third wicket.
Skipper Kieran Brooker made it 48-4 when he had opener Sam Naughton caught behind by Peter Jacob for 32.
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Hide AdBut Scothern put on a fifth-wicket stand of 98 in a display of resilience from their middle order as Joe Atkin (57) and James Drabble (61) helped the hosts to a competitive 214-8 from their 50 overs.
And just 5.4 overs were possible of the Caistor reply as rain ended it on 16-0, with Harry Boulton unbeaten on 15.
Caistor remain third, 22 points behind leaders Scunthorpe and nine behind Messingham.