Holy lady gets rescue dog right away — better when undressed? (2,10)

'holy lady' is the definition.

'rescue dog right away better when undressed?' is the wordplay.
'rescue dog' becomes 'stbernard' (St Bernards were historically used as rescue dogs).
'right' becomes 'r' (common abbreviation).
'away' indicates named letters should be taken away.
'better' is an anagram indicator (with an improved letter-order).
'when undressed?' becomes 'ette' (I can't explain this - if you can you should give a lot more credence to this answer).
'stbernard' with 'r' taken away is 'stbenard'.
'stbenard' anagrammed gives 'stbernad'.
'stbernad'+'ette'='ST BERNADETTE'

'gets' acts as a link.