A light-headed sailor seen in church (5)
I believe the answer is:
altar
'in church' is the definition.
The answer and definition can be both man-made objects as well as being singular nouns.
Maybe there's a link between them I don't understand?
'a light-headed sailor' is the wordplay.
'light-headed' becomes 'l' (this could be a standard abbreviation of which I'm unaware).
'sailor' becomes 'tar' (slang term for a sailor).
'a'+'l'+'tar'='ALTAR'
'seen' acts as a link.
Can you help me to learn more?
(Other definitions for altar that I've seen before include "Focus of church worship" , "Where Lucy Ashton was led" , "location for union negotiation" , "Table used for religious ceremony" , "Table used for the mass or eucharist" .)