Look, local sides start to smash lounges (5)
I believe the answer is:
lolls
'lounges' is the definition.
(I've seen this in another clue)
'look local sides start to smash' is the wordplay.
'look' becomes 'lo' ('lo' is an archaic exclamation meaning 'look!').
'sides' says to hollow out the word (remove centre letters) (only the letters on the sides are used).
'start to' says to take the initial letters.
'local' with its centre removed is 'll'.
The initial letter of 'smash' is 's'.
'lo'+'ll'+'s'='LOLLS'
(Another definition for lolls that I've seen is " Sprawls".)