Escape slowly after Poles have a nap (6)
I believe the answer is:
snooze
'a nap' is the definition.
(I know that nap can be written as snooze)
'escape slowly after poles' is the wordplay.
'escape slowly' becomes 'ooze' (I've seen this in another clue).
'after' means one lot of letters go next to another.
'poles' becomes 'SN' (North and South poles).
'ooze' put after 'sn' is 'SNOOZE'.
'have' acts as a link.
(Other definitions for snooze that I've seen before include "Catnap" , "Some sleeping" , "A short light sleep" , "Sleep lightly" , "drop off" .)