What does the cryptic crossword clue "Back massage with spirit to cover the whole body (5)" mean?

The wordplay uses a reversal. RUB (reversal="RUB") + KA (synonym="KA") = BURKA The answer is BURKA.

Back massage with spirit to cover the whole body (5)

Guardian Cryptic #26288 | 7 Down | 2014-06-17 flower