Knock down hotel along with manual worker (8)
I believe the answer is:
deckhand
'manual worker' is the definition.
(a deckhand is a manual worker on a ship)
'knock down hotel along with' is the wordplay.
'knock down' becomes 'deck' (deck can mean to knock over).
'hotel' becomes 'h' (phonetic alphabet: alpha, bravo, charlie etc.).
'along with' becomes 'and' (I've seen this in another clue).
'deck'+'h'+'and'='DECKHAND'
(Other definitions for deckhand that I've seen before include "one employed on board?" , "Ship worker" , "seaman" , "crew member" .)