Look after your ticker (5)
I believe the answer is:
watch
This clue might be a double definition.
'look after' is the first definition.
(thesaurus)
'ticker' is the second definition.
(synonyms)
'your' acts as a link.
I am not very happy about this link. It may belong to one of the definitions.
Can you help me to learn more?
(Other definitions for watch that I've seen before include "View" , "Look at attentively" , "See 21" , "Vigil" , "period of duty" .)