Time to do something? Sensitivity needed (4)
I believe the answer is:
tact
'sensitivity needed' is the definition.
(tact can mean sensitivity)
'time to do something?' is the wordplay.
'time' becomes 't' (abbreviation).
'to' is a charade indicator (letters next to each other).
'do something?' becomes 'act' (to act is to do something).
't'+'act'='TACT'
(Other definitions for tact that I've seen before include "Fine perception" , "Diplomatic sensitivity" , "measure of diplomacy?" , "Diplomacy or discretion" , "Consideration and sensitivity" .)