Summary, like what's shown on NY clocks (6)
I believe the answer is:
digest
'summary' is the definition.
(I've seen this in another clue)
'like what's shown on ny clocks' is the wordplay.
'like' becomes 'dig' (I've seen this in another clue).
'what's shown on' means one lot of letters go next to another.
'ny clocks' becomes 'est' (I can't explain this - if you can you should give a lot more credence to this answer).
'dig'+'est'='DIGEST'
Can you help me to learn more?
(Other definitions for digest that I've seen before include "Collection of shortened versions" , "Break down in the stomach" , "Synopsis" , "Summary or shortened version" , "Take in (information or food)" .)