Hesitate when seeing father sitting on facility (5)
I believe the answer is:
pause
'hesitate' is the definition.
(I know that hesitate can be written as pause)
'seeing father sitting on facility' is the wordplay.
'seeing father' becomes 'pa' (pa can mean dad or father).
'sitting on facility' becomes 'use' (I can't justify this - if you can you should give a lot more credence to this answer).
'pa'+'use'='PAUSE'
'when' acts as a link.
Can you help me to learn more?
(Other definitions for pause that I've seen before include "Kick" , "Wait" , "Halt briefly" , "Intermission" , "Temporary inactivity" .)