Sussex 2nd XI were dismissed for a modest 267 by Glamorgan in the opening day of their Championship tussle at Horsham.
Jamie Carpenter was the pick of the Sussex batsmen, batting for four-and-a-quarter hours to reach 97.
Sussex, who went into the clash having lost five of their previous eight games, struggled to make headway after winning the toss on a pitch which took spin early on and debutant left-armer Danny Nolan claimed 4-35 in 14.4 overs.
The spinner had Nash caught at first slip for 65, ending a fifth wicket stand of 125 with Carpenter. This had come off 82 balls with seven fours and three sixes.
In reply the Welsh county quickly lost Ryan Watkins for 18, but Ian Thomas and David Hemp struck unbeaten half centuries to guide their side to 151-1.
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