Clue: Primarily, practically, your really resolute hardship is counter-productive? (7)
Answer: PYRRHIC
Explanation: Definition: Primarily, practically, your really resolute hardship is counter-productive
One of Everyman's famous 'primarily' clues, formed from the first letters of the remaining words, with an &lit definition, generally encountered in the expression 'Pyrrhic victory', named after King Pyrrhus of Epirus, who, in 279 BC, won the Batttle of Asculum against the Romans, but at such high cost that he was essentially unable to continue the campaign.