The word unclasping is playable in Words With Friends™, no blanks required. Because it is longer than 7 letters, you would have to play off an existing word or do it in several moves.
Words With Friends™ Letter Score: 22
Highest Scoring Words With Friends™ Play In The Letters unclasping
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Seven Letter Word Alert: (23 words)
causing, cingula, cusping, glucans, inclasp, lacings, lancing, lapsing, pausing, placing, planing, plugins, pulsing, sapling, saucing, scaling, spacing, spicula, unalign, unclasp, uncling, unclips, unsling