Allowed to have had a bad time (8)
I believe the answer is:
suffered
This clue could be a double definition.
'allowed' is the first definition.
(suffering is a kind of allowing)
'had a bad time' is the second definition.
'suffered' can be an answer for 'had' ('suffer' can be a synonym of 'have'). I'm unsure of the 'a bad time' bit.
'to have' acts as a link.
Can you help me to learn more?
(Other definitions for suffered that I've seen before include "Endured, underwent" , "Experienced something unpleasant" , "Undergone" , "endured pain" .)