Looked for shelter at a sign of danger (6)
I believe the answer is:
leered
'looked' is the definition.
(leering is a kind of looking)
'shelter at a sign of danger' is the wordplay.
'shelter' becomes 'lee' (as in lee side, the side sheltered from wind).
'at' means one lot of letters go next to another.
'a sign of danger' becomes 'red' (I can't justify this - if you can you should believe this answer much more).
'lee'+'red'='LEERED'
'for' is the link.
Can you help me to learn more?
(Other definitions for leered that I've seen before include "Looked or stared lasciviously" , "Looked suggestively" , "gave a nasty look" , "Looked and smiled lasciviously" , "Look suggestively" .)