Think it’s catcalls you hear (4)
I believe the answer is:
muse
'think' is the definition.
(to muse on something is to think about it)
'it's catcalls you hear' is the wordplay.
I cannot quite see how this works, but
'you' could be 'u' (commonly used in online communication) and 'u' is located in the answer.
'it' could be 'e' ('e' can mean 'electronic' which is similar to 'IT') and 'e' is located in the answer.
The remaining letters 'ms' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for muse that I've seen before include "Source of inspiration; rock group" , "The source of an artist's inspiration" , "Ponder in meditative way" , "Cogitate" , "Source of artistic inspiration" .)