Comparatively risky to ignore daughter becoming more aloof (5)
I believe the answer is:
icier
'more aloof' is the definition.
(I've seen this before)
'comparatively risky to ignore daughter' is the wordplay.
'comparatively risky' becomes 'dicier' ('dicey' can be a synonym of 'risky').
'to ignore' is a deletion indicator.
'daughter' becomes 'd'.
'dicier' with 'd' taken out is 'ICIER'.
'becoming' is the link.
(Other definitions for icier that I've seen before include "much less friendly" , "More slippery" , "Colder even than 31 Across" , "comparatively aloof" , "More glacial" .)