Cheerfully roam, dashing to trap one skein of geese? (9)
I believe the answer is:
gallivant
'cheerfully roam' is the definition.
'gallivant' can be an answer for 'roam' (gallivanting is a kind of roaming). I'm unsure of the 'cheerfully' bit.
'dashing to trap one skein of geese?' is the wordplay.
'dashing' becomes 'gallant' (synonyms).
'to trap' indicates putting letters inside.
'one skein of geese?' becomes 'iv' (I can't justify this - if you can you should give a lot more credence to this answer).
'gallant' enclosing 'iv' is 'GALLIVANT'.
Can you help me to learn more?
(Other definitions for gallivant that I've seen before include "tour for pleasure" , "go in search of pleasure" , "Go out seeking amusement" , "Gad about, seeking pleasure" , "Pleasure-seek" .)