Terribly dear men wander aimlessly (7)
I believe the answer is:
meander
'wander aimlessly' is the definition.
(I've seen this in another clue)
'terribly dear men' is the wordplay.
'terribly' indicates anagramming the letters.
'dear'+'men'='dearmen'
'dearmen' anagrammed gives 'MEANDER'.
(Other definitions for meander that I've seen before include "Zigzag" , "an Indo-European river" , "windy" , "Wandering direction" , "Dear men (anag) - wander" .)