Huge area young girl is touring with male (8)
I believe the answer is:
landmass
'huge area' is the definition.
(I've seen this before)
'young girl is touring with male' is the wordplay.
'young girl' becomes 'lass' ('lass' can be a synonym of 'young girl').
'is touring' indicates putting letters inside (touring can mean going round).
'with' becomes 'and' (I've seen this before**).
'male' becomes 'm' (common abbreviation).
'and'+'m'='andm'
'lass' placed around 'andm' is 'LANDMASS'.
(Other definitions for landmass that I've seen before include "Huge area" , "Eg, a continent" , "Asia, say" .)