See, check and notice initially (4)
I believe the answer is:
scan
'see' is the definition.
(thesaurus)
'check and notice initially' is the wordplay.
'check' becomes 'sc' (I am not sure about this - if you are sure you should believe this answer much more).
'initially' says to take the initial letters.
The initial letters of 'and notice' is 'an'.
'sc'+'an'='SCAN'
Can you help me to learn more?
(Other definitions for scan that I've seen before include "Survey - examine" , "Inspect" , "Browse or skin over, say book" , "Hercule ---, detective" , "Examine (to transmit)" .)