House for sailors, as at the Cape (4)
I believe the answer is:
horn
'the cape' is the definition.
(both can mean a headland)
'house for sailors' is the wordplay.
'house' becomes 'ho' (abbreviation for house).
'for' says to put letters next to each other.
'sailors' becomes 'RN' (Royal Navy).
'ho'+'rn'='HORN'
'as at' acts as a link.
This may not be right. Some or all of it may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for horn that I've seen before include "Musical instrument - antler" , "Instrument - rhino's feature" , "Head growth; cornucopia" , "Wind instrument - cape" , "Hooter" .)