Say, a space turned into berth (7)
I believe the answer is:
moorage
'berth' is the definition.
(I know that berth can be written as moorage)
'say a space turned' is the wordplay.
'say' becomes 'eg' (both can mean for example).
'space' becomes 'room' (enough space or room to do something).
'turned' says the letters should be written backwards.
'eg'+'a'+'room'='egaroom'
'egaroom' written backwards gives 'MOORAGE'.
'into' is the link.
(Other definitions for moorage that I've seen before include "The price for stopping" , "Fee for securing boat" , "Berthing fee" , "Fee paid for tying up a boat" , "Anchorage N or charge for using it!" .)