Generation ____ (3)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">generation</span>' is the definition.<br/ ><span class="explanation-format__explanation">(as in age group)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for age that I've seen before include "Time in years" , "Period piece" , "Get old" , "Just a number" , "Epoch" .)
(Other definitions for gap that I've seen before include "Pause" , "A breach or pass" , "A break in something continuous, like a hedge" , "Fissure" , "Vacancy" .)