Look soft at both ends (4)
I believe the answer is:
peep
'look' is the definition.
(peep can mean to look at something)
'soft at both ends' is the wordplay.
'soft' becomes 'p' (musical abbreviation for 'piano', soft).
'at' says to put letters next to each other (I've seen this in other clues).
'both ends' becomes 'pee' (I am not sure about this - if you are sure you should believe this answer much more).
'p' after 'pee' is 'PEEP'.
Can you help me to learn more?
(Other definitions for peep that I've seen before include "Sly look (palindrome)" , "Secret look" , "Look surreptitiously, like Tom" , "Palindromic glimpse" , "Large underground chamber" .)