Observe Mr Tyler going to church (5)
I believe the answer is:
watch
'observe' is the definition.
(I know that observe is a more specific form of the action watch)
'mr tyler going to church' is the wordplay.
I cannot really understand how this works, but
'mr' could be 'wat' and 'wat' is located in the answer.
'church' could be 'ch' (common abbreviation) and 'ch' is found within the answer.
This accounts for all the letters.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for watch that I've seen before include "View" , "Observe - guard" , "Observe - timepiece" , "Keep an eye on - timepiece" , "Look at attentively" .)