Let loose having drunk rum, walk unsteadily (6)
I believe the answer is:
toddle
'walk unsteadily' is the definition.
(I've seen this before)
'let loose having drunk rum' is the wordplay.
'loose' is an anagram indicator (letters are loosened from their original positions).
'having drunk' is an insertion indicator.
'rum' becomes 'odd' (I've seen this before).
'let' is an anagram of 'tle'.
'tle' enclosing 'odd' is 'TODDLE'.
(Other definitions for toddle that I've seen before include "Move like someone starting out on life" , "Walk like baby" , "Walk like a young child" , "Walk uncertainly like infant" , "Of young child, walk unsteadily" .)