Definition: "Air"

This is an anagram - look for an indicator word that suggests mixing or rearranging letters.

'developed' is the anagram indicator - rearrange the letters of 'TALENT IVE' (talent I've without the apostrophe).

Answer: VENTILATE | 'developed' indicates an anagram of TALENT I'VE, which rearranges to spell VENTILATE (meaning to air).