Derby have been trying to bolster their attacking options for several weeks.
Attempts to sign Leicester's Martyn Waghorn and Conor Sammon from Kilmarnock both failed in the January transfer window but Clough did sign Jamie Ward on loan from Sheffield United last week, and earlier this week Millwall's Theo Robinson joined on loan until the end of the season.
Hayes joined North End in the summer but has failed to win a regular place.
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