Husband at hand, timeless chap (6)
I believe the answer is:
howard
'chap' is the definition.
I cannot understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for howard that I've seen before include "T [Thespian]" , "Man" , "- Hughes, US_recluse" , "-- Hughes, reclusive US?tycoon" , "Castle - - , Yorks." .)