Cautiously trap German lady on vacation (8)
I believe the answer is:
gingerly
'cautiously' is the definition.
(I've seen this before)
'trap german lady on vacation' is the wordplay.
'trap' becomes 'gin' (gin trap is a kind of animal trap).
'german' becomes 'ger' (abbreviation).
'on vacation' says to hollow out the word (remove centre letters).
'lady' with its middle taken out is 'ly'.
'gin'+'ger'+'ly'='GINGERLY'
(Other definitions for gingerly that I've seen before include "Cautiously (as if in pain?)" , "Showing caution" , "(Approach) in a cautious manner" , "In a careful manner" , "With soft steps" .)